Unified Glossary

A Class %	The percentage of total consumption value that corresponds to “A” class parts in the inventory.
Accepted Qty	The quantity of parts accepted after inspection.
Access Panel	Panels, which provide work area access for performing maintenance activities.
Access Panel Task #	The unique number identifying the access panel task. Access panel tasks refer to corollary tasks relating to access panel removal or installation. These access panel tasks can be associated to any number of access panels.
Acknowledgement Ref #	A unique number identifying the acknowledgment.
Acquisition Value	The cost of acquisition of the aircraft.
Active	The status of a document, when it can be accessed for editing, authorizing, mapping or any other transaction.
Actual Duration	The actual duration, in hours, days or minutes, spent on executing the component work order or task.
Actual Reimbursement %	The actual percentage of reimbursement by vendor for the part, against a warranty claim.
AD	Airworthiness Directive. AD is the directive propagated by the regulatory authority. Directives are engineering change communications, which relate to critical safety and reliability improvements of the aircraft or its components. Directives are used to address emergency situations (arising out of accidents, incidents etc.) and require mandatory and immediate compliance.
Adapt Time	The flight time for which the aircraft is subject to adapt tax.
Adhoc Schedule	A work agenda where shifts can be sporadically assigned to the days of a given month or period. Unlike a rota schedule, it does not require a continuous assignment of shifts for every day of the period. When this adhoc schedule is applied to individual employees, it constitutes the employee’s timetable.
Adjustment Value Tolerance	The minimum tolerance value, below or equal to which, stock adjustment is not required.
Advance All By (Days)	The number of days by which the execution of the work order or task must be advanced.
After Refuel	The amount of fuel in the aircraft fuel tanks at the time of departure.
Agreement #	Identifies the contract document between two parties, typically a seller (or service provider) and a buyer.
Aircraft Condition	The condition of the aircraft, which could be “Operational” or “Under Maintenance”. “Operational” indicates that the aircraft is in working condition and “Under Maintenance” indicates that the aircraft is under maintenance.
Aircraft Configuration	The hierarchy of the position codes and part numbers representing the various systems of the aircraft. The logical structure is the representation of the skeleton of the aircraft as a maintainable asset.
Aircraft Group #	A unique number identifying an aircraft group. An aircraft group is a collection of aircraft with unique registration numbers.
Aircraft Identifier Type	The type by which the aircraft is identified. The aircraft could be identified by its registration number, manufacturer serial number, variable tab number or the tail number.
Aircraft Model	Aircraft model is an alphanumeric number, inclusive of dash numbers if any, which identifies a type or design of aircraft.
Aircraft Ownership	The ownership type of the aircraft, which could be “Owned”, “Leased” or “Leased Out”. “Owned” indicates that the aircraft is owned; “Leased” indicates that the aircraft is taken on lease; “Leased Out” indicates that the aircraft is leased out to a third party.
Aircraft Reg #	A unique number allotted to an aircraft by the regulatory authority of the country in which it is registered.
Aircraft Route #	The number by which a journey of all aircraft belonging to the fleet (as defined in the system) for a time period as per the active flight assignment, is identified. The system generates the aircraft route number according to the numbering type selected.
Airline Tasks	Airline tasks are tasks, which are not contained in MPDs, AMMs, CMMs or SBs, but are specific to the airline.
Alert Interval	The period at which an alert message must be displayed about an impending due date for performing the work unit in the maintenance program.
Alert Value	The value that indicates that the minimum shelf life of the part is nearing expiry.
Alert Value (Days)	The value or date after which the corresponding work unit is considered in the component maintenance forecast.
Alert Value for ATA system	The reliability alert value for each ATA system. It is calculated as per predefined formula based on flying hours and the number of defects reported in the ATA system.
Alert Value for Component	The reliability alert value for each aircraft component. It is calculated as per predefined formula based on flying hours and the number of removals due to failures.
Allocated Qty	The quantity allocated to the warehouse.
Allotment Mode	The mode of allotment of ordered quantity, which could be “By Percentage” or “By Number”. By Percentage – when the allotment to the various locations is made as a percentage of the ordered quantity. By Number – when the allotment to the various locations is made in terms of numbers.
Alternate part number	The part number that can be used in case of non-availability of the requested part.
Alternate Station	The alternative destination station that can be considered, in case the aircraft cannot land in the specified destination.
Amendment #	The amendment number mentioned in the regulatory directive. In a different context, the “Amendment #” is also used to indicate the number of authorized changes made to the document.
AMM / CMM Item #	The Aircraft Maintenance Manual (AMM) or the Component Maintenance Manual (CMM) item number given in the respective manuals.
AMOC	Alternate Means of Compliance. AMOC refers to the alternate method by which a proposed engineering change can be complied with. The alternate method could be the execution of a work unit or a different SB or Retrofit or even changing of the Next Higher Assembly (NHA) itself.
AMOC Type	Alternate Means of Compliance (AMOC) type is the type of execution for the related MCRs or the AMOC documents, which could be “Execute Any” or “Execute All”. Execute Any – indicates that you can execute any MCR that is defined as alternate means of compliance for the current MCR. Execute All – indicates that you must execute all the MCRs that are defined as alternate means of compliance for the current MCR.
Analysis #	A unique number identifying the part classification analysis document.
Analysis Type	The type of part classification methodologies such as ABC Class, FSN Class, XYZ Class or VED Class, to be performed for the parts in the inventory.
AOG	Aircraft On Ground. AOG indicates the priority of the work. Highest priority to be allotted, if the work is set as AOG.
Applicable Resource Group	The resource group, to which the certificate is applicable such as Mechanic or Inspector.
Approval #	The approval number an employee possesses, which authorizes the employee to carry out or sign off specific maintenance tasks.
Approved By	The name of the user who last approved the document.
Approved Date	The date on which the document was last approved.
Approver #	The number identifying the approver.
APU	Auxiliary Power Unit. APUs are engine-driven generators contained in the aircraft (usually in the tail) that provide the aircraft with necessary energy during the time the aircraft is at the gate. It is a gas turbine engine intended for use as a power source for driving generators, hydraulic pumps and other airplane accessories, equipment and / or to provide compressed air for airplane pneumatic system.
Arrival Date	The actual date of arrival of the flight.
Arrival Time	The actual time of arrival of the flight.
Assembly Status	Indicates whether the component is attached to the position code. The system displays either “Complete” or “Incomplete”. Complete – When the component is attached to the position code. Incomplete – When the component is not attached to the position code.
Assigned Duration	The duration for which the resource is already assigned for the work order or task.
Assigned Hours	The total number of hours for which the employee is already assigned to the work order or task.
Assignment	The work allocated to an employee in a specific function.
Assignment Number	An employee can hold multiple assignments in an organization. Each assignment is given a unique identifier called Assignment Number.
Associated Parameter	The parameter to which the formula is associated.
At Dep Oil	The engine oil quantity at the time of departure.
ATA #	Air Transport Association of America (ATA) number is a numbering system developed by the Air Transport Association of America, to standardize the identification of different aircraft systems across aircraft models. Hence ATA 21 refers to the air conditioning system, be it A320 or Boeing 757.
Attendance Parameters	Rules and regulations that will influence the employee’s attendance, overtime, shift schedules and timetable.
Attendance Processing	Refers to system computing the attendance for a specified set of employees, for a given period, in conformance with the attendance policies and rules defined for the rota plan to which the employees are mapped.
Attendance Type	The attendance type of the employee, such as normal, holiday or overtime.
Attribute	The basic properties or characteristics of a part. Attributes are used for tracing the quality of the part when it flows through different processes.
Attribute Code	A unique number identifying the attribute.
Attribute Parameters	Qualitative attributes, which take values from a pre-defined set, are identified as attribute parameters. For example, if the color of the engine oil is the attribute parameter, its values can be clear, brown or black.
Attribute Type	The type of the attribute, which could be “Quantitative” or “Qualitative”. Quantitative attributes are those that can be expressed numerically using a unit of measurement. E.g. Diameter of a bolt. Qualitative attributes are those that cannot be measured or expressed numerically. E.g. color of the oil.
Authorization #	The authorization number of the person who is issuing the airworthiness tag for a component.
Authorization Committee #	A unique number identifying an authorization committee. Authorization Committee authorizes or approves an Engineering Order or Fleet Campaign Directive to be issued against a Service Bulletin.
Authorized By	The name of the user who last authorized the document.
Authorized Date	The date on which the document was last authorized.
Available Qty	The number of parts available in the warehouse.
Average Stay for F Class	The percentage of cumulative average stay for fasting moving parts in inventory.
Average Stay for N Class	The percentage of cumulative average stay for non-moving parts in inventory.
Average Stay for S Class	The percentage of cumulative average stay for slow moving parts in inventory.
Average Value	The average value of the lead parameter, based on which the forecast factor of the parameter is calculated.
Avg. Daily Utilization	The flying hours for the month divided by the number of days in the month, or number of days in the month for which the aircraft was part of the Reliability Fleet. Note: Flight hours for each aircraft is equal to the Time Since New value as of the last date of the month minus Time Since New value of Flight Hours parameter as of the first date of the month.
Avg. Flight Duration	The flying hours for the month divided by the flight cycles for the month. Note 1: Flight hours for each aircraft is equal to the Time Since New value as of the last date of the month minus Time Since New value of Flight Hours parameter as of the first date of the month. Note 2: Flight cycles for each aircraft is equal to the Time Since New value as of the last date of the month minus Time Since New value of Flight Cycles parameter as of the first date of the month.

B Class %	The percentage of total consumption value that corresponds to “B” class parts in the inventory.
Back Dated Reporting Time Limit	The time limit until which the actuals can be reported for the component work order.
Back Flushing Required	Indicates that the part is a back flushable item. Back flushing means that the inventory stock is reduced, based on the production count of the assemblies produced.
Balance BPO Quantity	The balance quantity of the BPO. This is the difference between the BPO quantities per stock and the quantities of stock ordered so far through various release slips.
Base Currency	The code identifying the currency that is used as the base currency by the company. This is the currency in which the company reports to the statutory authority.
Base lining	The method in which the system maintains the configuration details with a new revision number, for future reference for the baselined configuration. If baseline version already exists for the configuration, it will also be retained with the respective revision numbers, with the status set as “Revised”.
Base Part Number	An attribute of the part number. It is used to track the changes of a given part number due to engineering modifications. The base part number helps in keeping track of changes made to the part number without altering the initial part number.
Basic Currency Value	The value of the document in the base currency of the organization.
Basic Loan Charges	The calendar and parameter based charges applicable for loaning the part.
Basic Removal	When the component is removed due to a problem in the same component, it is termed as basic removal.
Basic Removal (Y/N)	The option that indicates whether the component is removed due to a problem in the same component.
Basic Value	The value of a document excluding taxes, charges and discounts.
BER	Beyond Economic Repair. A component is categorized as BER when its projected cost of repair is above a preset percentage of its replacement costs.
BER Acceptance	The status indicating whether the component is accepted as BER. This could be "Accepted" or "Rejected". Accepted – indicates that the supplier has accepted the declaration of the component as 'BER' (Beyond Economic Repair). Rejected – indicates that the supplier has rejected the declaration of the component as 'BER' (Beyond Economic Repair).
Before Refuel	The amount of fuel in the aircraft fuel tanks before refueling.
Billing Code	The billing code number mentioned in the regulatory directive.
Block Hours	The total time from the moment the aircraft first moves under its own power for the purpose of taking off, until the moment it comes to rest at the end of the flight. It includes taxi and takeoff roll time.
Body Station #	A unique number identifying the different sections of the aircraft along the longitudinal axis.
Book Value	The present value of the aircraft.
BPO	Blanket Purchase Order. BPO is created for procurement of parts based on long-term contracts or agreement with the supplier. This is undertaken for supply of material having low value and high level of requirement.
BPO Balance Value	The balance value of the BPO. This is the difference between the BPO value and the value of stocks ordered so far through various release slips.
BPO Basic Value	The basic value of the BPO. This is calculated as the sum of the basic value of all the parts that are ordered.
BPO Location	The organization unit in which the BPO was created.
BPO Type	The type of the blanket purchase order, which could be “Rate”, “Quantity” or “Value”. Rate – This type of BPO indicates that the part is bought at a fixed rate. This rate is valid for a given period. Quantity – This type of BPO indicates that there exists a long-term agreement on the quantity that will be ordered. This quantity is the total quantity required across locations. Value – This type of BPO specifies the total business that is guaranteed to the supplier on a set of parts. The total order value of all the parts will be equal to this value.
Break Sessions	The time segment, which is the recess between two work sessions, in a shift.
Business Component Name	The description of the Business Component. For example, “Part Administration” could be a business component under the function “Inventory”.
Buyer	A representative of the purchasing unit, who interacts with the suppliers and acts as a primary source for procuring materials.
Buyer Group	A set of buyers.
Buyer Maximum Value	The maximum amount for which the buyer has authority to procure parts.
Buyer Minimum Value	The minimum amount for which the buyer has authority to procure parts.

C Class %	The percentage of total consumption value that corresponds to “C” class parts in the inventory.
CAGE	Commercial and Government Entity Code. This code is assigned to the manufacturer by the government for manufacturing the part.
Calendar Based Charges	The charges applicable based on the loan duration.
Call Sign	Call sign is a radio identifier and name for an aircraft or flight of aircraft.
Call Sign Type	Indicates the type of customer call sign, which could be “Regular” or “Special”.
Capacity	The capability of the facility. The capacity is specified in terms of UOM defined for the facility like 50Tons, 10m, etc.
Capacity Constraint	A constraint imposed on the warehouse either by volume, quantity or weight.
Carrier Code	The unique code identifying the carrier used for transportation.
Carry Forward	‘Carry forward’ refers to the postponement of maintenance tasks. The maintenance tasks could range from inspection to replacement of a suspected unserviceable component.
Category	The unique code identifying the predefined category in the system.
Cause #	The unique code to identify the cause.
CC Interval	Cycle Count Interval. This indicates the number of days after which the cycle count must be repeated for a particular class of a part.
CC Plan #	Cycle Count Plan Number. CC plan is a document that contains planning details for the cycle count.
CC Sheet #	Cycle Count Sheet Number. CC sheet is a physical document that lists the items to be counted and their location in the warehouse.
CDL	Configuration Deviation List. The CDL is a listing of FAA-approved non-structural external parts that may be missing but the airplane remains airworthy. It is contained in an approved Airplane Flight Manual (AFM) appendix.
Certificate #	The certificate number for the airworthiness certificate for a component.
Certification By	Indicates the type of person issuing CoM, which could be “Internal” or “Freelance”. Internal – Indicates that the person issuing the CoM belongs to the organization. Freelancer – Indicates that the person issuing the CoM does not belong to the organization but authorized to issue CoM.
Certification Category	The category to which the certificate belongs.
Certifying Authority	The agencies that can issue a certificate to a supplier or a part.
CF Authorization #	Carry Forward Authorization. CF Authorization is the authorization obtained from the maintenance controller in case an item being carried forward is not in the "MEL" list, or an item which is already carried forward under the provisions of the MEL requires escalation in terms of the parameters FH, FC, EH, EC or time.
Change Doc Type	The type of the change request document, which could be “MCR” or “FCD”.
Change in Electrical Load	The change in the electrical load of the aircraft after the execution of the MCR or EO.
Change In Moment	The change in the moment of the aircraft after the execution of the MCR or EO.
Change In Weight	The change in the weight of the aircraft after the execution of the MCR or EO.
Change Order #	A unique number identifying a change order. A change order is a document, which authorizes a change. The document could either be an engineering order or a fleet campaign document.
Change Request #	The number identifying the change request for which the engineering order is created.
Chapter-Section	The number identifying the chapter or section that is affected due to the MCR execution.
Child CWO Count	The number of child component work orders of the parent component work order (CWO).
Child Work Center	The work center that is attached to a parent work center in the work center hierarchy.
Claim Acceptance Status	The status of the claim acceptance. This could be "Accepted", "Partially Accepted", "Hold" or "Rejected". Accepted – the status of the claim when the supplier accepts it. Partially Accepted – the status of the claim when the supplier partially accepts it. Hold – the status of the claim when the supplier holds it. Rejected – the status of the claim when the supplier rejects it.
Claim Amount	The actual amount claimed from the supplier.
Claim Type	The type of the warranty claim. The types could be "Failure", "Reliability" or "Others". Failure – indicates that the warranty claim is created due to the failure of the component. Reliability – indicates that the warranty claim is created due to reliability factors. Others – indicate that the warranty claim is raised due to a reason other than failure and reliability.
Class	The class to which the cycle count sheet or PI plan belongs. This is based on the classification methodology adopted.
Clock Status	The status of the clock, which could be one of the following: Clock-Direct – Indicates that the employee has reported normal work hours for the work order/task using the clock. Clock-Indirect – Indicates the employee has reported indirect work hours using the clock. Clock-Direct & Indirect – Indicates that the employee has reported direct and indirect work hours using the clock. Not Started – Indicates that the clock is not started for the employee.
Close Access Panel Task	The task required to be performed to close the access panel.
CMM Tasks	Component Maintenance Manual Tasks. CMM tasks are the maintenance tasks, prescribed by the component manufacturers, which are enlisted in the Component Maintenance Manual. CMM tasks are further categorized into ‘Overhaul’, ‘Bench Check’ or ‘Others’. Bench check tasks are typically inspection/testing procedures that are executed at pre-defined intervals, that is, when the storage life is exceeded, or whenever a problem is reported (on-condition), on a component.
CMP Revision #	The revision number of the component maintenance program.
CoM	Certificate of Maintenance. CoM is the document that is generated to certify the maintenance work, such as overhaul, repair, modification or replacement, executed on an item. CoM is issued in situations where the maintenance work executed on an item affects another employee’s work, directly or indirectly and hence requires certification by an authority.
CoM Required	Indicates that the certificate of maintenance (CoM) is required after the component work order execution.
CoM Status	Certificate of Maintenance status. The status of the certificate of maintenance, which could be “Fresh”, “Authorized” or “Canceled”.
Comments	Any additional information, remarks or annotations.
Company	A legally recognized entity representing the business operation of an organization.
Company Code	A unique code identifying the company.
Competency Ratio	The weightage of the competency, based on which the system must retrieve the employee records.
Compliance Date	The date on which the MCR must be complied with.
Compliance Type	The compliance type for the MCR, which could be "Date Based", "Usage Based" or "Date & Usage Based".
Compliance Value	The value of the consumption parameter based on which the MCR will be executed.
Component #	A unique number identifying the component. Components are the building blocks for the systems in the aircraft. They are items or equipment that are attached to a parent entity (which can be the aircraft or another component) and moves from one parent to another during its active life.
Component Condition	The condition of the component which could be “New”, “Overhauled”, “Serviceable”, “Unserviceable” or “Phased Out”. “New” indicates a new component; “Overhauled” indicates that the component must be repaired; “Serviceable” indicates that the component is in use; “Unserviceable” indicates that the component is unusable and “Phased Out” indicates that the component cannot be used for any operation.
Component Configuration	The configuration of a specific instance of a serial number for a given component part number.
Component Ownership	The type of ownership of the component, which could be “Owned”, “Supplier” or “Customer”. “Owned” indicates that the aircraft operator owns the component; “Supplier” indicates that the supplier owns the component and “Customer” indicates that the customer owns the component.
Component Possession Status	The mode of possession of the component, which could be one of the following: Loaned in – Indicates that the company has loaned in the component. Rented Out – Indicates that the company has rented the component out. PBH – Indicates that the component is under PBH coverage.
Component Replacement #	Component Replacement is a document, which contains information as to which part number and serial number must be removed from which position code and which component must be installed. A replacement transaction number is generated for every replacement of the component.
Component Status	The physical status of the component.
Component Type	The type of the component, which could be “Engine”, “APU” or “Landing Gear”.
Component Work Order #	A unique number identifying the component work order. Component work order is a document that contains information about the maintenance work to be carried out on a component in a shop.
Condition Returned	The condition in which the stock is returned, which could be “New”, “Surplus”, “Overhaul”, “Serviceable” and “Unserviceable”.
Conditions	The pre-requisites for a part to be used in an unserviceable state in the aircraft. For example an anti-ice valve may go unserviceable if the same is locked in the open position.
Configuration	Configuration represents the hierarchical relationships of the various constituent systems that make-up a maintainable entity (such as an aircraft or a major assembly).
Configuration Class	Configuration class is a group of aircraft having similar attributes like number of engines attached, number of APUs attached, aircraft type, usage type etc.
Consequences	The consequences that may result on the execution of the modification document.
Constituent Type	The type of constituent for performing the service. The constituent type could be one of the following: Principal Part – The part on which the service has to be carried out. Primary Output – The primary output after the service has been completed. Secondary Output – The additional output if any, provided along with the primary output. Core Returnable Input – The core parts that are to be returned along with the primary output. Returnable Input – The returnable parts such as spares, which can be sent along with the primary part. Issuable Input – The parts that are issued for performing the service. Non Issuable Input – The parts that are not issued for performing the service.
Consumption Parameters	Parameters of an aircraft or its component that increase in value upon usage. Parameters such as flight hours and flight cycles are categorized under this type. The life of an aircraft or the component can also be expressed in terms of one or more consumption parameters.
Consumption Rate For F Class	The percentage of cumulative consumption rate for fast moving parts in inventory.
Consumption Rate For N Class	The percentage of cumulative consumption rate for non-moving parts in inventory.
Consumption Rate For S Class	The percentage of cumulative consumption rate for slow moving parts in inventory.
Contract Deductible	The value below which an item will not be covered under PBH.
Controllable	These components normally have a high annual consumption value. Hence the procurement of such components needs to be controlled. Some of these components may have to be replaced on reaching their prescribed life limit. The life of these components must be tracked.
Conversion Factor	The multiplication factor between two units of measurement.
Conversion Quantity	The quantity of the stock for which the status is converted.
Core Exchange Warehouse	The core exchange warehouse mapped to each unserviceable receivable warehouse and to which all the unserviceable components or parts are to be returned.
Core Return Option	Indicates the type of change allowed on the returned component, after the repair is performed. The following options are available: P/N Change Allowed – indicates that the part number can be changed. S/N Change Allowed – indicates that the part serial number can be changed. P/N and S/N Change Allowed – indicates that the part and serial number can be changed. No Change Allowed – indicates that no change is allowed on the returned component.
Corrected Quantity	The quantity obtained on counting the stock physically.
Correction Basis	The basis on which the stock correction is made, which could be “Physical Inventory”, “Cycle Count” or “General”.
Correction Method	The method, which could be “Direct” or “Costing Method”, used for the calculation of stock correction value. Direct – Indicates that the user can directly enter the correction value. Costing method – Indicates that the correction value will be calculated by the system based on the valuation method.
Correction Quantity	The discrepancy quantity between the system stock and the physical stock. Correction Quantity = Corrected Quantity – System Stock Quantity.
Correction Type	The type of stock correction, which could be “Quantity”, “Value” or “Quantity & Value”. Quantity – Indicates that the stock quantity is corrected. Value – Indicates that the stock value is corrected. Quantity & Value – Indicates that the stock quantity and value are corrected.
Cost	The cost of the part.
Cost of Refurbishment	The cost that will be incurred on the component repair.
Cost Per	The quantity of the part for which the cost is specified. For example, if the cost of one box of oil tins is $100 and the number of tins in one box is 50, “Cost Per” is taken to be 50.
Costing Usage	The cost center usage (consumption point) for the item.
Count Interval (Days)	The number of days after which the cycle count must be repeated for a part.
Count Quantity	The quantity of parts counted during physical inventory counting or cycle counting.
Count Tolerance In %	The minimum adjustment tolerance level in percentage, below or equal to which no adjustment is required for the existing discrepancy.
Count Tolerance In Units	The minimum adjustment tolerance level in units, below or equal to which no adjustment is required for the existing discrepancy.
CR Numbering Type	The numbering type for the component replacement transaction.
Created By	The name of the user who created the document or data entity.
Created Date	The date on which the document or data entity was created.
CSI	Cycles Since Inspection. CSI is the cumulative flying cycles of the component since its last inspection in the shop or on-wing inspection in the aircraft in Hangar.
CSN	Cycles Since New. CSN is the cumulative flying cycles of the component since it is manufactured.
CSR	Cycles Since Repair. CSR is the cumulative flying cycles of the component since its last repair in the shop.
CSV	Cycles Since Visit. CSV is the cumulative flying cycles of the component, since its last visit to the shop for maintenance.
Currency	The currency in which the supplier, company or organization unit transacts.
Currency Sub-Units	The sub-units of the currency. For example, for the currency “US Dollar”, the sub-units is “100” (1 USD = 100 Cents).
Current Accuracy	The current accuracy percentage for a particular class of part. It is calculated as the ratio of the number of parts of a particular class having discrepancy to total number of parts in that class.
Customer #	The unique code identifying the customer.
Customer Account Group	A unique code that identifies the account group under which the customer is grouped.
Customer Call Sign	A reference number by which the customer job is tracked.
Customer Code	The code identifying the customer whose aircraft must be subjected to MCR execution.
Customer Effectivity #	The customer effectivity number is another identifier for an aircraft. It is usually used in the aircraft manuals like IPC, AMM, FIM etc.
Customer Shipping Note #	A unique number identifying the note attached by the customer while shipping the component.
CWO Status	Component Work Order Status. The status of the component work order, which could be “Scheduled”, “Inprogress”, “Completed” or “Closed”.
CWO Type	Component Work Order Type. The type of the component work order, which could be overhaul, repair, inspection etc.
Cycle Count	An inventory control method to check and control the variation between the system inventory records and the actual inventory levels.

Date of Manufacture	The date of manufacture of the aircraft.
Daylight saving time	Daylight Saving Time (or Summer Time as it is called in many countries) is a way of getting more out of the summer days by advancing the clocks by one hour during the summer. Then, the sun will appear to rise one hour later in the morning when people are usually asleep anyway, at the benefit of one hour longer evenings when awake: The sunset and sunrise are one hour later than during normal time.
Daylight saving Time Difference	The time difference, in hours, minutes or seconds, between the daylight saving time and the standard time for the time zone.
Daylight saving time End Date	The ending date on which the normal time is reverted to from the daylight saving time, for the specified time zone.
Daylight saving time End Month	The ending month on which the normal time is reverted to from the daylight saving time, for the specified time zone.
Daylight saving time End Time	The ending time on which the normal time is reverted to from the daylight saving time, for the specified time zone.
Def Aircraft Model #	The number identifying the aircraft model identified as the default model preferred to be used in the flight assignment.
Default Inspection Type	The default type of inspection to be performed for the parts supplied, which could be “None”, “Self”, or “By Inspector”.
Default Lead Time	The default minimum time required by the supplier, from the time of order, to supply the items.
Default Lead Time Unit	The default unit of measurement for the purchase lead time required by the supplier to supply the parts.
Default Matching Type	The default type of matching to be performed for the parts supplied, which could be “Two Way”, “Three Way at PO”, “Three Way at GR”, “Four Way at PO” and “Four Way at GR”.
Default Numbering Type	The numbering type that is used by default for a specific transaction type.
Default Time Zone for Occ. Processing	The default time zone for occurrence processing.
Default Tolerance %	The default percentage of tolerance allowed for the parts supplied during inspection.
Default Tolerance Type	The default type of tolerance for the parts supplied, which could be “Quantity”, “Value” or “Both”.
Default Warranty Duration	The default period, in terms of months or years, as set in the Warranty Agreement.
Deferment Policy	The type of deferment policy for deferring or postponing the work unit. The deferment policy can be “Not Allowed”, “Complete Work Unit” or “Constituent Work Unit”.
Deferment Request #	A unique number identifying the deferment request. A deferment request is a document created to defer work units due in an execution center.
Deferral Type	The type of carry forward. Refers to the classification of items that could be carried forward into "MEL", "CDL" or "Others". Minimum Equipment List (MEL) is the list of items, approved by the local airworthiness authority, which may remain in an unserviceable state for a certain period, but still provide an acceptable level of safety in the operation of the aircraft. The CDL is a listing of FAA-approved non-structural external parts that may be missing but the airplane remains airworthy.
Deferral Value - EC	The maximum engine cycles, before the attainment of which, a carried forward item must be repaired or replaced.
Deferral Value - EH	The maximum engine hours, before the attainment of which, a carried forward item must be repaired or replaced.
Deferral Value - FC	The maximum flying cycles, before the attainment of which, a carried forward item must be repaired or replaced.
Deferral Value - FH	The maximum flying hours, before the attainment of which, a carried forward item must be repaired or replaced.
Delay Code	A unique number that represents a delay. Delays can occur at the arrival and departure of an aircraft owing to various reasons such as technical failure, unfavorable weather condition, security checks etc.
Delay On	Indicates whether the delay of the aircraft is during “Arrival” or “Departure”.
Delay On Arr. (Day/Hr/Min)	The difference between the actual date/time of arrival and the scheduled arrival date/time.
Delay on Dep (Day/Hr/Min)	The difference between the actual date/time of departure and the scheduled departure date/time.
Delay Type	The type of delay code. Delay code is classified into three types ”IATA”, “ICAO” or “Other”, depending on the origin.
Delivery Area Code	The code identifying the area where the goods are delivered.
Delivery Note	The document sent by the supplier along with the goods supplied. It contains the details of the materials supplied.
Delivery Point	The place or the location where the supplier must deliver the parts.
Delivery Rating	The criteria considered for computing supplier rating based on the delivery performance of the supplier.
Delivery Type	The type of delivery for the material, namely “Single” or “Multiple”. Single – Indicates that the material must be delivered in single shipment. Multiple – Indicates that the material must be delivered in multiple batches.
Department	A function or section of the organization where all the employees work towards achieving a common goal. A department can also refer to a group formed to undertake a task.
Departure Date	The actual date of departure of the flight.
Departure Time	The actual time of departure of the flight.
Dependent Part #	The part number that must be fitted in the dependent position code, when the reference part number is fitted in the reference position code.
Dependent Position Code	The position code that is dependent on the reference position code and the reference part number.
Designed Shelf Life	The maximum period of time, for which an item may be held in inventory before it becomes unusable.
Desired Accuracy (%)	The desired accuracy percentage for the item of the particular class.
Destination Path	The path, in the business component and organization unit, where the document is uploaded.
Difference From UTC	The time difference, in hours, minutes or seconds, between the local time zone and the UTC.
Discount	The discount by which a vendor is prepared to reduce the cost by virtue of trade practices, good will or for payment within a given period of time.
Discount Days	The number of days, within which the due amount must be paid, to avail the discount offered.
Discrepancy #	A unique number identifying the discrepancy. Discrepancies are typically the symptoms of the problem, which are observed by the person in charge, like pilot, mechanic or the cabin crew, and are recorded in the flight log.
Discrepancy Per Flight Hour	The number of discrepancies per flight hour reported for the ATA chapter.
Discrepancy Type	The type under which a discrepancy can be categorized. Discrepancy can be of the following types: PIREP - Denotes “Pilot reported discrepancies”. MIREP - Denotes “Mechanic reported discrepancies”.
Disposition	The disbursement or delivery of stock to sources of demand. In this method of planning, material movements anticipated in the various business processes or functions across the enterprise are tracked.
Dispositionable	Indicates whether the part is of planning type “Disposition”. Disposition parts are those parts reserved for upcoming maintenance activities. Reservation of the parts helps in meeting the demands at the right time.
Distributor	Indicates that the supplier is a distributor of parts.
Docket #	The docket number mentioned in the regulatory directive.
Document	The commercial document namely “Purchase Order”, “Purchase Request”, “Blanket Purchase Order”, “Release Slip”, “Repair Order” and “Exchange Order”.
Document Schedule #	The number indicating the schedule in a document.
Document Status	The status of the document. This indicates the completeness or the authorization that the document has received thus far.
Document Terminating Level	The level at which the routing of the document is terminated.
Draft	The status of the document, when all the mandatory information has not yet been entered.
Drawing #	The number identifying the drawing that depicts the details of the part.
Drawing Reference	The number identifying the document containing the drawing reference.
Drawing Revision #	The revision number of the drawing document.
Dry	A type of lease that indicates that the lessor would maintain the aircraft.
DSC #	Dependent System Condition Number. DSC is the condition or the required state of the various related systems before executing a maintenance task. For example, the hydraulic system needs to be depressurized before removal of brake or relevant circuit breakers are to be pulled out to carryout a landing gear retraction test.
Due %	The percentage of the transaction amount that must be paid to the supplier on or before the number of days specified.
Due Days	The number of days within which a said amount of the transaction value must be paid to the supplier.
Duty	The duty of the employee, which could be “Pilot”, “Co-pilot”, “Mechanic” or “Others”.

EAD Level	Earliest Available Date level. The EAD level is the level at which the earliest available date details of free stock must be retrieved. The EAD details may be retrieved at the warehouse level or at the stocking location level.
EAN Effectivity	Engineering Advice Note effectivity indicates the applicability of the EAN to a type, series, model or individual item.
Earliest Arising On	The earliest date of all the scheduled dates of the pending work units to be performed on the aircraft.
Earliest Available Date	The earliest date by which the stock would be available in the stocking location or warehouse.
Earliest Due Date	The earliest need date of the part.
EEO Class	The Equal Employment Opportunity classification, which is captured as a part of Job Information.
Effectivity	Indicates the applicability of tasks, items, materials, and/or technical data to a type, series, model, or individual item. For example, Aircraft effectivity could have values “All” or “Restricted”. All – when the task is applicable to all the aircraft of a particular model. Restricted – when the task is applicable only to some instances of aircraft belonging to a particular model.
EIPN	End Item Part Number. EIPN is the super parent of the part.
Employee #	The unique number identifying the employee.
Employee-Qualification	The qualification possessed by the employee. Qualification is the academic details, like Bachelor of Engineering, Master of Science.
Employee Time Sheet Updation Mode	The mode for updating the employee time sheet, which could be one of the following: Clock – Indicates that the employee time sheet must be updated using a clock. Manual – Indicates that the employee time sheet must be updated manually.
Employment Unit	The organization unit where the employee is assigned a job.
Engg & Tech Delay (Day/Hr/Min)	Schedule interruption of an aircraft owing to engineering and technical problems.
Engg Advice Note #	A unique number identifying the engineering advice note. Engineering Advice Note prescribes a suitable maintenance action and represents the authority to execute the same, in the event of the approved maintenance procedures not being adequate to address the situation on hand.
Engg Service Req #	A unique number identifying an engineering service request. ESR is a document raised to communicate the request for clarifications to the respective engineering cell on a maintenance object.
Engg. Org. Unit	The engineering organizational unit that released the source document, engineering order.
Engine Bleed?	Indicates whether the engine was bled, during cruise flight while recording the engine parameter values. Engine bleed, also known as customer bleed, is an air pressure tapping taken usually from the high-pressure compressor stage of a jet engine for air-conditioning and pressurization.
Engine Set #	The engine set number of the aircraft.
Engineer’s Advice	The advice of the engineer regarding the change request.
EO #	Engineering Order Number, which uniquely identifies the engineering order. Engineering Order is a document, which provides special instructions to inspect, service, or modify the aircraft in some manner. Engineering order could be of the types "Replacement", "Retro fitment", “Task”, “Improvisation”, “Task Schedule related” or “Informative”.
EO / FCD Follow-Up Action	Engineering Order / Fleet Campaign Directive Follow-Up Action. This refers to the follow-up action required after performing the EO or FCD.
EPR	Engine Power Ratio. EPR is the ratio of pressure as measured at the exhaust of the engine to the pressure as measured at the inlet of the low-pressure compressor.
Equipment	An identifiable unit of the machinery that aids in the performance of maintenance tasks on an aircraft and its components. Some examples are lathe, shaper and landing gear bottlejack.
Error ID	The unique number identifying the error that occurred while executing a transaction.
Estimated Duration	The estimated duration of time spent for the maintenance activity.
ETOPS	Extended Twin Operations. ETOPS is the acronym created by ICAO to describe the operation of a twin-engined aircraft over a route that contains a point further than one hour’s flying time, at the approved one engine inoperative cruise speed from an adequate airport.
Exchange rate	The conversion factor between any two currencies. This could be either direct (between the currencies) or derived (through intermediary currency).
Exchangeable	The part that can be exchanged with another part available in the same login organization unit.
Execution Facility	The location where the work unit must be executed, which could be "In-house" or "Out Source". In-house – indicates that the work unit must be performed within the company. Out Source – indicates that the work unit must be given to the third party for execution.
Execution Unit	The organizational unit in which the work scope will be executed. A work scope contains the details of the work units or jobs to be performed on the component.
Expected Reimbursement %	The percentage of reimbursement expected for the part.
Expendable #	A unique number identifying the expendable. Expendables are individual items held (additional to those installed on aircraft) for the purpose of providing replacements for those removed from the aircraft for overhaul, repair or rectification.
Expense Type	The type of expense incurred while purchasing the part. This could be “Capital” or “Revenue”.
Expenses	The expense incurred on the remedial work carried out on the component.
External Repair shop Warehouse	The warehouse where all the unserviceable components or parts are routed for external repair through a Repair Order or a Sub Contract Order.

F/F (Kg / Hour)	Fuel Flow. ‘F/F (Kg / Hour)’ indicates the fuel consumption rate.
FAA	Federal Aviation Administration. FAA is a regulatory authority for the various airline operations in US.
Facilities Cost	The cost of facilities that will be incurred on the component work order. This is applicable for resource types other than “Skill”. This cost is calculated by multiplying the rate defined for the facility with the quantity of resources estimated for all the tasks of CWO and for the resources estimated for the CWO.
Facility #	A unique number identifying the facility. Facilities are equipment or any other items required by the maintenance personnel to execute maintenance activities on an aircraft.
Facility Object Code	A unique code identifying the facility object. Facility objects are the identifiable units of facility.
Facility Type	The type of the facility, which could be “Equipment”, “Tools” or “Others”.
Family details	Employee’s family details including Dependent Status, Marital Status, Occupation, Gender etc. These details are recorded to understand the employees’ family background.
Fault #	The unique code to identify the fault.
Fault Category	The category to which the fault belongs, namely “Observed” or “Cabin”. Observed Faults – Faults that affect the airworthiness of the aircraft. These types of faults are given importance as they affect the performance of the aircraft. Example of such a fault is “VHF#1 is inoperative.” Cabin Faults – Faults that do not affect the airworthiness of the aircraft. Example of such a fault is “Oven in mid galley not heating up.”
Fault Code Type	The type of the fault code namely, “OEM” and “Airline”. OEM Faults – Faults, which are codified by the Original Equipment Manufacturers. Airline Faults – Faults that the mechanic may rectify through experience gained over a period of time. These are codified by the airlines, so that they can serve as a knowledge base.
Fault Particulars	Any additional remarks pertaining to the fault.
FCD #	Fleet Campaign Directive Number, which uniquely identifies the fleet campaign directive. Fleet Campaign Directive is a directive issued for inspection and emergency maintenance actions. Normally it is taken up on priority and is a blanket order to the field to either replace parts or perform a particular service on a fleet.
Field Base	A work center primarily defined for performing minor maintenance activities.
Findings	The observations recorded on the defective component after inspection.
Firm Demand Qty	The total quantity of parts for which firm demands exist in the system. A demand is firm when it is certain to happen. For example, scheduling of a hangar work order, scheduling of a component work order, authorizing a material request etc. triggers a firm demand.
Firm Receipt Qty	A firm receipt quantity is the quantity of stock whose receipt is confirmed and is certain to happen. Firm receipts result due to transactions such as Purchase Order and Release Slip, which are an indication that the procurement action has been initiated. Firm receipt quantity is the sum of the quantities of all Purchase Orders and Release Slips, which have been recorded in the system.
Fleet #	A unique number assigned to the fleet.
% Fleet FH	The present period flight hours as a percentage of summation of flight hours for all aircraft in the fleet in the current period.
% Fleet FH (Last period)	The present period flight hours as a percentage of summation of flight hours for all aircraft in the fleet in the last period.
Fleet Status	The status of the fleet, which can be either “Active” or “Inactive”.
Flight #	A 3-digit or 4-digit number, usually prefixed by 2 letters. The number is unique for a starting, en-route and destination station in a day’s schedule. The prefixes usually stand for the Airline operator code. Leg number refers to one take-off and one landing during the execution of a trip. A trip may consist of one or more flight legs.
Flight Assignment #	The unique number identifying the flight assignment. Flight assignment is the scheduling of flight services from a scheduled source to scheduled destination. The flight assignment could be a combination of one or more flights and/or legs.
Flight Code	The code identifying the type of flight.
Flight Sheet #	The number identifying the flight sheet. Flight sheet is a document that provides flight information of an aircraft, to the billing department, for the purpose of customer billing.
Flying Cycles	Each take-off and landing combination of the aircraft constitutes a flying cycle.
Flying Hours	The time for which the aircraft was in the air.
Forecast #	A unique number identifying the forecast done for the component. The forecast contains the details of the scheduled component maintenance arising along with the dates.
Forecast End Date	The ending date of the forecast. This is the date till which the system will forecast the maintenance arising.
Forecast Factor	A multiplication factor used for forecasting the maintenance activities on the aircraft. It is used on the average value of the lead parameter for forecasting the maintenance activities.
Forecast Start Date	The starting date of the forecast.
Forecasting Horizon	The duration for which the maintenance budget forecasting is performed.
Formula #	A unique identifier for a formula. A formula is created by defining a relationship between aircraft or component parameters using mathematical operators and coefficients. Parameters that can take numeric value can participate in a formula.
Formula Content	The entity that has the actual definition of the formula. It contains the participating parameters and mathematical operators.
FR	Failure Rate. Failure rate of a component is the number of confirmed failures of a component expressed in terms of a base period; Usually per 1000 aircraft hours or 1000 engine hours.
Free Firm Qty	The quantity of parts, for which the firm receipts have not been reserved by plan or firm demand.
Free Stock Qty (on a requested date)	The sum of the Free Firm Quantity and the total Firm Receipts reserved by Plan Demands, minus the Firm Problem Demands, which could not be reserved against the receipts greater than the requested date’s receipt.
Fresh	The status of the document, when all the mandatory information has been completely entered.
Fuel Consumption Rate	The number of kilos of fuel consumed per hour of flight.
Function Area	The description of the Function. For example, Sales, Maintenance or Purchase could be the functional area.

Gate Pass #	The unique number identifying the gate pass. Gate pass is the entry pass given to the vehicle carrying the consignment as it enters the receipt location.
Goods Receipt	The acknowledgement by an organization, of goods received from a supplier, against an order.
Goods Receipt Transaction	A receipt transaction where the goods are received against a purchase order.
GPA / Percentage	Gross Percentile Average / Percentage, acquired by the employee for a specified qualification.
GR #	Goods Receipt Number. A unique number that identifies the goods receipt document.
GR Line #	Goods Receipt Line Number. It is the unique number for every line in the multiline containing part numbers specified in the goods receipt.
GR Type	Goods Receipt Type. The GR type is based on the PO types, Release Slip types and Service types.
Grade	A specific level in the job hierarchy that exists within the organization.
Grade set	A group of grades in the organization. For example, grade set in an organization can be Senior Management, Middle Management, Junior Management etc.
Gross Volume	The gross volume of the part.
Gross Weight	The gross weight of the part.
Ground Consumption	The amount of fuel consumed when the aircraft is on ground during a halt. This includes any fuel consumed by the APU, if operational, and any fuel consumed during engine ground run-up, if any.
Grounding Cost	The cost incurred when the aircraft is grounded for executing the change request. This cost includes the opportunity cost, that is, the revenue loss for not flying.
Grounding Date	The date on which the aircraft is grounded for the execution of maintenance activities.
GRS #	Goods Return to Supplier Number. A unique number that identifies the goods return document, which is raised while returning the goods to the supplier. For example, when returning the rejected goods to the supplier after inspection.
GRS Type	Goods Return to Supplier Type. GRS Type is the type of the goods return note, which could be “Return” or “Scrap”. Return – Indicates that the goods return note is raised for the goods that are returned to the supplier, after rejection. Scrap – Indicates that the goods return note is raised for scrap material.

Hard Allocation Required	Indicates whether a part is to be reserved or hard allocated.
Hazardous	Indicates that the part is dangerous while handling.
Historical Period for Unscheduled Cost Calculation	The period for which the cost incurred on unscheduled maintenance will be considered, for maintenance budget forecasting.
Holding Period	The period for which the component declared as "Beyond Economic Repair" will be kept on hold by the airline operator.
Holiday Master	A list containing all the holidays applicable with a specific period.
HR Set Up Unit	The description of the organization where the HR Set Up business component has been deployed.

IATA #	International Air Transport Association Number. ‘IATA #’ refers to the code defined by the IATA for stations / airports all over the world.
ICAO #	International Civil Aviation Organization Number. ‘ICAO #’ refers to the code defined by the ICAO for stations / airports all over the world.
Identification details	Identification document details (such as passport, driving license) and physiological information (such as blood group, birthmarks, height and weight) pertaining to the employee.
Inactive	The status of a document, when the system does not permit the document to be accessed for editing, authorizing, mapping or any other transaction.
Incident	The unique number identifying the incident associated with the occurrence of an event.
Incident Type	The type of accident or incident. The types could be a bird hit, lightning strike, hard landing, overweight landing, high energy stop etc.
INCO Term	International Commercial Term. INCO term indicates the party, such as the supplier, carrier or customer, with whom the risks and responsibilities lie, when parts are being shipped. Some examples are Free on Board, Ex Works and Free Alongside Ship.
Incoming Serial #	The serial number of the installed part.
Induction Date	The date on which the aircraft or component is inducted into the organization.
Inflight Delay (Day/Hr/Min)	The total delay in the flight schedule, which is the difference between the delay at arrival and delay on departure, in terms of days, hours and minutes.
In-House Repairable (Y/N)	The option that indicates whether the part can be repaired in the operator's shop itself.
Initial Accuracy	The initial current accuracy for the first cycle count. The system automatically updates for the subsequent count.
Initial Monthly Reliability Alert	The initialization of reliability alert values (for a system or component), which could be operator-provided, in the case where a legacy system exists, or OEM-provided, in the case of a new fleet for a month.
Initial Reliability Alert	The initialization of reliability alert values (for a system or component), which could be operator-provided, in the case where a legacy system exists, or OEM-provided, in the case of a new fleet for a reliability calendar.
In–Situ	Indicates that the maintenance activity must be executed on the component when the component is fitted to the aircraft.
Inspected By	The name of the person who carried out the inspection.
Inspected Date	The date on which the component is inspected by the inspector.
Inspection Cost Reimbursement (Y/N)	The option that indicates whether the supplier will remit the inspection cost or not.
Inspection Qty	The quantity of goods that is inspected.
Inspection Type	The type of inspection to be performed on the parts supplied by the supplier, which could be “None”, “Self” or “By Inspector”. None – Indicates that inspection is not required for the supplied parts. Self – Indicates that the part has to be checked by the customer himself. By Inspector – Indicates that a third party who is external to the company does the inspection.
Installation Date	The date on which the installation is done.
Installation Time	The time at which the installation is done.
Installed By	The number identifying the employee who performed the installation.
Insurance Amount	The total insurance amount to be borne for the part, to cover for risks while shipment.
Insurance By	The agency that would bear the insurance cost during shipping. The agencies could be "Supplier" or "Operator". Supplier – indicates that the supplier of the part would bear the insurance cost. Operator – indicates that the airline operator would bear the insurance cost.
Insurance Liability	Indicates who should bear the insurance amount, whether the ordering company, supplier or “Others”.
Insurance Terms	The conditions, which could prevail for claiming the insurance.
Interchangeability	The interchangeability of the part, which could be “One Way”, “Two Way” or “None”. One Way – indicates that the part numbers are not interchangeable in the same position code. For example, if the part number “P2” has replaced the part “P1” in the position code “PC1”, then “P1” cannot replace the part “P2” subsequently in the same position code. Two Way – indicates that the part numbers are interchangeable in the same position code. For example, the part numbers “P1” and “P2” can replace each other in the same position code subsequently. None – indicates that “P1” cannot be replaced by “P2”.
Interchangeable Part #	An interchangeable part, sub-assembly, assembly or unit that meets or exceeds the required functional and structural specifications for a given application. While it has the same mounting provisions, overall dimensions and connections may vary, provided that installation does not require rework or modification.
Interval Value	The interval value specified for the execution of the MCR in terms of parameters or days.
Inventoried	Indicates that the MCR must be executed on the component when the component is not fitted to the aircraft.
Inventory Part #	The manufacturers’, suppliers’ or the industry standard identifier for the subject part, assembly, kit or material item.
Invoice #	The number identifying the invoice through which the claim amount is paid.
Invoicing Org. Unit Name	The name of the organization unit that processes the invoice document sent by the supplier.
ISO Currency Code	A unique code assigned for every currency by the International Organization for Standardization (ISO) such as ‘USD’ for US Dollar.
Issue #	The unique number identifying the issue document.
Issue Date	The date on which the parts are issued against the reference document.
Issue in Single Lot	Indicates that the part must be issued as a single lot, that is, the entire quantity requested must be issued at the same time.
Issue Part #	The number identifying the part that is issued.
Issue Qty #	The number of parts that are issued.
Issue Warehouse #	The warehouse or the stocking point from where the stocks are issued.
Issued Quantity	The quantity of parts issued from the warehouse for a task or component work order.
Issued Serial #	The serial number of the component issued.

Job	The work an employee performs in an organization.
Job Classification	Jobs in the organization are classified into various groups, say, a job ‘Manager-HR’, may be classified as ‘Managerial Job’. Another job, which may be ‘Team Leader-HR’, may also be classified as ‘Managerial Job’.
Job rate	Every Job is associated with a specific rate. The rates shall be of two types, namely, Standard Rates and Overtime Rates. These rates shall be defined for all jobs, facilitating budgeting based on the job rates.
Job Source	The source of the work unit or job to be performed. This could be one of the following: Engineering Order – Indicates that the work units to be performed are derived from the engineering order. FCD – Indicates that the work units to be performed are derived from the Fleet Campaign Directives. CMP-Engineering – Indicates that the work units are derived from component maintenance program, for both one-time and recurring types. Deferred – Indicates that the work units to be performed are derived from the deferred list. CMP – Indicates that the work units to be performed are derived from the component maintenance program and forecast other than engineering and shelf-life-expired jobs. Shelf Life Expiry – Indicates that the work units are derived because of shelf life expiry. Unserviceable – Indicates that the work units are created due to snag reported in the field maintenance or hangar maintenance.
Job Status	The status of the job or the work unit to be performed. The statuses could be "Pending" or "Allocated". Pending – indicates that the work unit must be allocated to visit package or work scope. Allocated – indicates that the work unit is already allocated to visit package or work scope.
Job Type	The type of the maintenance job that needs to be performed. The job types could be "Off-Wing", "On-Wing" or "Component Removal". On-Wing – indicates that the maintenance job must be performed when the component is fitted on the aircraft. Off-Wing – indicates that the job must be performed after the component is detached from the aircraft. Component Removal – indicates that the job must be performed for the component removal.
Journey Log #	A unique number generated by the system, to identify each journey log. The journey log is recorded after the accomplishment of a flight by an aircraft.

Key Word	The unique key word to identify the data entity.
Kit Part #	The number identifying the kit part.

Labor Cost	The cost of labor that will be incurred on the maintenance activity. This cost is calculated by multiplying the rate defined for the skill with the quantity of skill estimated for the maintenance activity.
Lag	The time gap between the primary task and the dependent tasks.
Landing Cycles	The number of times the flight takes off and lands, considering each take off and landing as one cycle. This count will also include the touch and go landings.
Landing Date & Time	The date and time of landing.
Language proficiency details	The employee’s proficiency in various languages and the proficiency level.
Last Forecast #	The number identifying the last forecast generated by the planner group for the planning object.
Last Generated No.	The last number generated by the system for a specific numbering type, prefix and suffix combination.
Last Modified By	The name of the user who last modified the document or data entity.
Last Modified Date	The date on which the document or data entity was last modified.
Last Performed Date	The date on which the work unit was performed last on a component.
Latitude	The angular distance between an imaginary line around a heavenly body parallel to its equator and the equator itself.
Lead Time	The purchase lead-time for a part. It consists of pre-order, post order and process order lead time.
Lead Time Units	The unit of measurement for the purchase lead time required by the supplier to supply the parts.
Lease Type	Indicates the type of lease, which could be “Wet” or “Dry”.
Lessee	The name of the lessee of the aircraft if the aircraft was taken on lease.
Lessor	The name of the lessor if the aircraft was taken on lease.
Level #	The number identifying the level at which the work center occurs in the hierarchy.
Level Code	Levels could be further broken into level codes for a configuration. For example if levels were 1,2,3 and so on, the level codes could be 1.1, 1.2 or 2.22, at the levels 1, 1 and 2 respectively.
License #	License is an authority conferred upon a mechanic or aircraft maintenance engineer by the local airworthiness authority to carry out maintenance on an aircraft. The license is numbered in order to trace the work done to the holder of the license.
License Category	The category to which the license belongs.
Life Parameter	The life parameter is a consumption parameter that indicates the life of the equipment or item.
Limit Control	The limit control for a discrepancy, which denotes the control over the deferral of the discrepancy. Limit control can be “Hard” or “Suggested”. “Hard” - Denotes that the discrepancy must be resolved within the specified time limit. “Suggested” - Denotes that the discrepancy can be further deferred.
Limit Type	The type of deferral limit associated to a MEL Category based on which the MEL item gets deferred. The limit type could be "Indefinite", "Time Based", "Usage Based" or "Time and Usage Based". Indefinite – indicates that the MEL item associated to this MEL category can be deferred indefinitely. Time Based – indicates that the deferral of the MEL item associated to this MEL category is time based and can be deferred till the date specified. Usage Based – indicates that the deferral of the MEL item associated to this MEL category is usage based and can be deferred till the value specified for the usage parameters is reached. Time and Usage Based – indicates that the deferral of MEL item associated to this MEL category is dependent on both the time and usage.
Line #	The unique number generated by the system, to identify the row in the multiline.
Line Item Cost	The cost of the line item.
Line Item Value	The basic value of the line item. The system calculates the line item value as: Line Item Value = Order Quantity * (Cost / Cost Per).
Link Flag	The flag value, that denotes the additional details that are entered for the document or the data entity.
Loan Agreement	The agreement duly signed by both loaner and loanee on part loaning. This agreement contains the loan charges, currency, commercial and shipping terms information.
Loan Order	A document created to loan a part into the operator’s inventory.
Loan Receipt	A document created when the operator receives a loaned part and moves it to the inventory.
Loanable	Indicates that the part can be loaned to another organization unit within the company.
Log Book #	Logbook number refers to either the journey logbook number or the technical logbook number. In the journey logbook, journey details like, departure, arrival date and time are recorded. The pilot observed discrepancies are also recorded. In the technical logbook, fuelling and oil uplift details along with discrepancy details and their resolution, are recorded.
Longitude	The arc or portion of the equator intersected between the meridian of a given place and the meridian of some other place from which longitude is reckoned, as from Greenwich, England, or sometimes from the capital of a country, as from Washington or Paris.
Lot #	Lot number refers to a unique identifier given to a set of parts received from the supplier in a particular instance.
Lot No Controlled	Indicates that the part is lot controlled. Lot controlled parts are the parts that are tracked by the lot number in the warehouse, when it is involved in different transactions.
Lot No Type Num	The numbering type for the lot number of the part.
Lot Quantity	The total quantity of a part that is identified as a single lot of parts.
Lot Quarantined Qty	The quantity in a lot that has been quarantined.

Maint Report #	A unique number identifying the maintenance report. A maintenance report is a document created for processing multiple reported or observed discrepancies arising from a related cause.
Maintainable	Indicates that the part is used for maintenance purpose.
Maintenance Base	The base where the maintenance activities of the aircraft or component are carried out.
Maintenance Implications	The maintenance implications on flying the aircraft with the part in an unserviceable state.
Maintenance Issue Transaction	An issue made from Inventory against a work order raised on a work center.
Maintenance Process	Indicates the maintenance process that is to be followed for the part. The maintenance process could be “Hard-Time”, “On-Condition” or “Condition Monitoring” (based on MSG-3 concept).
Maintenance Program #	A program, which defines a logical sequence of maintenance actions to be performed as events or pieces of a whole which, when performed collectively, results in achievement of the desired maintenance standards.
Maintenance Type	The type of maintenance work to be performed on the component. This could be "Overhaul", "Repair", "Inspection", "Others" or "Retire". Overhaul – Indicates that the component needs to be overhauled (complete refurbishment). Repair – Indicates that the component needs to be repaired to rectify the discrepancies reported. Inspection – Indicates that the component needs to be inspected to qualify a discrepancy or serviceability of the component as per schedule. Others – Indicates that the component will be subjected to any other maintenance work. Retire – Indicates that the component needs to be retired from further usage.
Make/Piece Part #	The number identifying the make part or piece part for which the component work order has been raised. Make Part is an assembly of multiple sub-parts assembled based on the make work order. The part thus assembled may or may not be part of an aircraft/component structure. The make part assembled using a make work order cannot be a serial-controlled or a lot-controlled item. Piece Part is a maintainable item, and is a physical part in the aircraft/component structure, but is not classified as a component.
Manufacturer #	The manufacturer of the aircraft or part.
Manufacturer ATA #	The unique number identifying the manufacturer’s ATA code.
Manufacturer Lot #	The lot number issued by the manufacturer.
Manufacturer Part Number	The manufacturer's identity for the part. This part number is mainly applicable for parts of type "Component".
Manufacturer Serial #	The manufacturer of an aircraft / component gives the MSN or the manufacturer’s serial number at the time of production. The MSN, together with the airplane model, can be used to identify an aircraft.
Mapping Status	Shows the mapping status of the fleet and the reliability calendar. The statuses could be fresh or confirmed. Note: Only “Confirmed” mapping status would be considered for reliability alert calculations.
Matching Type	Matching type or Invoice Matching is the comparison of the quantity and value of goods available at different points in the procurement process. The quantity ordered, quantity received or the quantity accepted is matched with the quantity invoiced to ensure that payment is made for the proper quantity and value of items. Two Way – This type of matching indicates that the user wants to match the invoiced quantity and value with the ordered quantity and value. Three Way at PO – Three-way matching indicates that the user wants to match the invoice after receipt of goods. In Three Way at PO, the invoice quantity is matched with the total received quantity against that PO, against all the GRs and not against individual GR. Three Way at GR – The invoice quantity is matched with the total received quantity against that PO, against each GR. Four Way at PO – Four-way matching indicates that the user wants to match the invoice after the goods have been accepted. In Four Way at PO, the invoice quantity is matched with the total accepted quantity against that PO, against all the GRs and not against individual GR. Four Way at GR – The invoice quantity is matched with the total accepted quantity against that PO, against each GR.
Material Controller	The employee in charge of maintaining the stock of a location.
Material Cost	The cost of material that will be incurred on the maintenance activity. This cost is calculated by multiplying the rate defined for the material with the quantity of parts estimated for the maintenance activity.
Material Request #	A unique number identifying the material request. Material Request (MR) is a document through which a user department communicates the need for material required for the execution of any activity, for a specific date to the respective stocking points, that is the warehouses.
Material Specification	The specification of the material composition of the part.
Material Type	The type of the material, which could be one of the following: Main Core – The part on which the maintenance work is carried out. Regular – Any other part required for maintenance work.
Matl Return Authority #	A unique number authorizing any material return, whenever a part is to be returned to another party.
Max.Active Forecasts	The number of active forecasts that can exist simultaneously for the sub fleet.
Maximum OT Hours/Week	The maximum number of hours per week for which an employee can avail overtime. This information is applicable only if there is a ceiling on the number of overtime hours in a week.
Maximum Reimbursement	The maximum reimbursement that is allowed for the part.
MCM #	Modification Committee Meeting Number. It is a unique number identifying modification committee meeting. This meeting is held to evaluate the change requests. The modification committee comprises representatives from the engineering, maintenance planning, material planning, production planning and in certain cases, a representative of the local regulatory authority.
MCR #	Maintenance Change Request Number. It is a unique number identifying the maintenance change request. MCR is the modification document that is used to communicate an engineering change to be performed on the aircraft or component. Service Bulletins and Airworthiness Directives can be recorded as MCR.
MCR Class	Maintenance Change Request Class. MCR class indicates the nature of execution of the MCR, which could be "Mandatory", "Optional" or "Informational".
MCR Doc Type	Maintenance Change Request Document Type. ‘MCR Doc Type’ indicates the type of the Maintenance Change Request (MCR) document. MCR documents are those that communicate engineering change requirements. Service bulletins and Airworthiness Directives are examples of MCR document types.
MCR Issue Date	The date on which the maintenance change request (MCR) is issued to the airline operators.
MCR Part #	The part number mentioned in the Maintenance Change Request (MCR) that lead to the creation of the engineering order that requested for the new part creation.
MEL	Minimum Equipment List. MEL is the list of equipment, approved by the local airworthiness authority, which may remain in an unserviceable state for a certain period, but still provide an acceptable level of safety in the operation of the aircraft. The unserviceable state may entail maintenance or operational implications. The maintenance implications may vary from as trivial a task like securing an anti-ice valve in the open position, to deactivation of a thrust reverser. The operational implications could vary from a weight penalty to flying at lower altitudes.
MEL Quantity	Minimum Equipment List Quantity. MEL Quantity is the maximum quantity of the part, component or system, which can remain unserviceable for the aircraft to fly in MEL configuration.
Method	The method for revising the estimates, which could be “Simple Average” or “Moving Average”. Simple Average – The sum of the values of a parameter divided by the number of values. Moving Average – A statistical term meaning the average of the parameter values over a specified time period. This is used in order to flatten out large fluctuations.
Minimum Order Qty	The minimum quantity that has to be ordered, whenever a purchase request or a purchase order is generated.
Minimum Shelf Life	The minimum period of time, for which an item may be held in inventory before it becomes unusable.
Mod Status	The status number assigned to a part whenever its properties are enhanced.
MOD Tasks	Mod tasks are tasks contained in the service bulletin necessitating the modification.
Mode of Execution	The method, in which the change request must be executed, which could be "EO" or "FCD".
Mode of Transport	The mode of transport by which the item is delivered.
Modified Part Applicability	Indicates the applicability of tasks, materials, and/or technical data to a modified part / component.
Monthly Reliability Alert for ATA System	The alert value calculated on the basis of number of snags reported in the specific month for the ATA system.
Monthly Reliability Alert for Component	The alert value calculated on the basis of number of removals and premature removals in the specific month for a component.
Moved Qty	The quantity of part that is moved to the warehouse.
MPD Tasks	Maintenance Planning Document Tasks. Maintenance tasks prescribed by the aircraft manufacturer for a particular aircraft model are enlisted in the Maintenance Planning Document (MPD). The standard maintenance tasks derived out of this technical document are classified as MPD Tasks. MPD tasks are typically performed on an aircraft and not on its components. The major and minor routine checks for the aircraft mainly comprise MPD tasks.
MR Class	The class to which the material request belongs, which could be one of the following: Maintenance – indicates that the material request is created for a maintenance requirement. General – indicates that the material request is created for a general requirement.
MR Priority	The priority assigned to the material request, which could be one of the following: Normal – Material request raised for parts that pertain to the usual requirement of an aircraft. AOG – Material request raised for the aircraft on ground.
MR Type	The type of the material request, which could be one of the following: Planned – Indicates that the material request is raised due to planned maintenance activities or execution documents, which contain the list of materials required. Unplanned – Indicates that the material request is raised from unplanned maintenance activities such as the line station.
MTBF	Mean Time Between Failures. A performance figure calculated by dividing the total unit flying hours (airborne) accrued in a period by the number of unit failures that occurred during that same period. Note: Where total unit operating hours are available, this may be used in lieu of total unit flying hours.
MTBR	A performance figure calculated by dividing the total unit flying hours accrued in a period by the number of unit removals (scheduled plus unscheduled) that occurred during the same period.
MTBUR	Mean Time Between Unscheduled Removals. A performance figure calculated by dividing the total unit flying hours (airborne) accrued in a period by the number of unscheduled unit removals that occurred during the same period.

NAVAIDS #	Navigational Aids. ‘NAVAIDS #’ is the unique number that identifies the navigational aid available in the station. This refers to any visual or electronic device, airborne or on the surface, which provides point-to-point guidance information or position data to aircraft in flight.
Navigational aids Class	The class to which the navigational aid belongs. The navigational aid is classified according to their operational use. The three classes are terminal, low altitude and high altitude.
Negative Tolerance	The tolerance indicates the limits for the parameter value or the execution date within which the maintenance activity is to be performed. The ‘Negative Tolerance’ indicates the lower limit below which it is not economical to perform maintenance work units.
Net Quantity	The quantity of part that is available for use after inspection. It is equal to the received quantity less the rejected quantity.
New Config. Revision #	The new revision number of the configuration, after the changes were made in the model configuration.
New Revision Type	The source of revision, which could be internal or external.
Newly Overhauled	Indicates that the “Overhaul” type of maintenance work is executed on the component due to shelf life expiry.
NHA	Next Higher Assembly. NHA is an assembly on which the particular item is attached, either directly or through intermediate attaching parts. The item may or may not be a part of the assembly.
NHA Component #	The number identifying the component in the next higher assembly (NHA).
NHA Part #	Next Higher Assembly Part Number. Indicates the number identifying the part, in the next higher assembly.
NHA Serial #	Next Higher Assembly Serial Number. Indicates the serial number of the NHA part.
No. of Pax	The number of passengers in the flight.
Non-Routine Task	The unscheduled, unplanned tasks that are carried out during the non-routine kind of maintenance. These tasks are not contained in the taskmaster and get stored in the system as a non-routine task.
Nose #	Also known as the aircraft registration number, the nose number of the aircraft is an aircraft identifier, which is primarily used by the marketing department of an airline.
Notes	Any additional information, remarks or comments pertaining to the document or the data entity.
NSCM	NATO Supply Code for Manufacturer. NATO assigns this code to the manufacturer, for manufacturing the part.
NT (Negative Tolerance) Close	The status of the document, when it is closed based on the tolerance percentage specified.
Number of Packs	The number of cartons or packages in which the received material has been packed.
Number of Units	The number of units with which the currency is traded in the international market.
Numbering Type	The numbering pattern, which helps in generating unique document numbers for the various transaction types. Numbering types provide a unique identity to a document across the application.
Numeric ISO Currency Code	The numeric ISO code given to the currency.
NVG Events	Night Vision Goggles Events. Indicates the number of events for which night vision goggles were required.

Object Type	The type of the non-component maintenance object. Non-component maintenance objects are categorized to raise component work order for the object. Non-components can be categorized as follows: Facility – Indicates that the work order must be raised for equipment or tools that are used in maintenance of components. Make – Indicates that the work order must be raised for parts that are assembled at the work center. Piece Part – Indicates that the work order must be raised for non-components. Project – Indicates that the work order must be raised for projects. Receipt-Inspection – Indicates that the work order must be raised for preliminary inspection of incoming components. Miscellaneous – Indicates that the work order must be raised for any other type of object that does not fall under any of the categories mentioned above.
Occurrence	Indicates whether the seasonal work unit period applies only for the current year or for all subsequent years. The system provides the options “Recurring” and “Non-recurring”.
Occurrence Occurred During	The activity during which the event has occurred. The activity could be “Pilot Activity”, “AMT Activity” or “Others”. Pilot Activity – Indicates that the event has occurred during pilot activity. AMT Activity – Indicates that the event has occurred during aircraft maintenance. Others – Indicates that the event has occurred during any other general aircraft activity.
Occurrence Report #	The number identifying the occurrence report generated for every occurrence reported by the pilot or the mechanic.
Occurrence Type	The type of the occurrence, which could be one of the following: Aircraft Related – Indicates that the occurrence report is created for an aircraft-related incident. Personnel Related – Indicates that the occurrence report pertains to any personnel. Spill – Indicates that the occurrence report is created for events such as spillage of oil. Tool / Equipment – Indicates that the occurrence report is created for tool or equipment-related incidents. Vehicle Related – Indicates that the occurrence report is created for vehicle-related incidents. Scheduled Maintenance – Indicates that the occurrence report is created for scheduled field maintenance during normal revenue flight time. Unscheduled Maintenance – Indicates that the occurrence report is created when the aircraft is grounded for unscheduled maintenance.
OEM Name	The name of the Original Equipment Manufacturer (OEM).
Old Config. Revision #	The original revision number of the configuration, when the engineering order was released.
On Arrival Fuel	The amount of fuel in the aircraft fuel tank on arrival.
On Arrival Oil	The amount of oil in the engine oil tank on arrival.
On Exchange	Indicates that the part is obtained on exchange.
On Loan	Indicates that the part is obtained on loan.
Open Access Panel Task	Open access panel task precedes the maintenance task to be performed. These tasks are performed to remove the required access panels for execution of the maintenance activity.
Open Periods	Refers to those reliability periods, which are not closed. Closing a period ensures that no flight log data would be included for processing reliability.
Opening Balance #	A unique number identifying the opening balance document.
Operating Frequency	The radio frequency of the navigational airport.
Operational Date	The date on which the aircraft or component is put into operation.
Operational Implications	The operational implications on flying the aircraft with the part in an unserviceable state.
Operational Location	The location or the operation where the aircraft is currently flying.
Operations Related Savings	The savings in aircraft operations if the modification is executed.
Operations Type	Indicates the operation type of the maintenance activity, which could be “FAR-135” or “FAR-145”.
Operator	The Airline operator.
Opportunity Maintenance (Y/N)	To optimize the component downtime and maintenance cost, sometimes it may be required to perform higher type maintenance on any work unit before it is due. This option indicates whether the work unit execution can be coupled with the execution of another work unit of the same or higher maintenance type.
Order #	The executive order number mentioned in the regulatory directive.
Order of Preference	The preferred order in which the interchangeable part must be considered for fitting in the reference position code.
Order Quantity	The total quantity of the part ordered.
Ordering Location	The organization units that have been designated as “Purchase Order raising locations” for the part.
Org. Unit #	A unique number identifying the organizational unit.
Org. Unit Name	The name or the description of the organizational unit.
Organizational Unit	A distinct organizational entity where a function or a set of related business functions are executed.
OU Description	The name or the description of the organization unit (OU).
Out Pass #	The unique number identifying the out pass. Out pass is the pass given to the vehicle carrying parts out of the company location.
Outgoing Condition	The condition of the outgoing component, which could be “Serviceable” or “Unserviceable”.
Outgoing Part #	The number identifying the part that is removed from the position code.
Outgoing Serial #	The serial number of the component that is removed from the position code.
Overall Rating	The process of rating suppliers to compare the rating of a supplier against the rating of all other suppliers for all the parts.
Overtime Processing	Refers to system computing the overtime attendance for a specified set of employees, for a given period, in conformance with the attendance overtime policies and rules defined for the rota plan to which the employees are mapped. The prerequisite for computing overtime is that the employee’s regular attendance for this period must have been processed and authorized.
Ownership Document #	A unique number identifying the ownership document.

P.R. Quantity	The total quantity of the parts required to be purchased, as specified in the purchase request.
P.R.Date	The date on which the purchase request is raised.
Packaging #	A unique number identifying the packaging method.
Packaging Code	The code that identifies the packaging terms to be used while packaging the parts for delivery.
Packaging Condition	The status of the packing, while packaging the parts for delivery.
Packaging Method	The method of packaging that is in use or expected to be used by suppliers, when shipping a part. These codes are used in the purchase-related business components, to specify the required packaging method.
Packaging Terms	Any instructions regarding the packaging of the goods.
Packing Slip #	The unique number that identifies the packing slip. Packing slip is the document sent by the supplier along with the goods supplied. It contains the details of the materials supplied.
Parameter	The measurable attribute of a component, such as CSO /TSO /CSI /TSI /CSR /TSR (Cycles/ Time Since Overhaul/ Visit/ Inspection/ Repair), through which the life and maintenance of a component is monitored.
Parameter Based Charges	The charges applicable based on the usage of the loaned part.
Parameter Interval	The class interval of the parameter for the depiction of data in a histogram. Note: The parameter could be flight hours or flight cycles.
Parameter Source	Indicates the source from which the value of the parameter must be updated. The parameter source could be “Flight Log”, “Manual”, “Calculated” or “Composite”. The parameter source is ”Manual”, when the parameter value is updated manually. The parameter source is ”Calculated”, when the parameter value is updated based on the formula associated to the parameter. This formula will contain mathematical operations to be performed on other related parameters. When the participating parameters are updated, the formula based parameter is automatically updated. The parameter source is ”Composite”, when the parameter value is updated either manually, or based on the formula associated to the parameter.
Parameter Type	The type of the parameter, which could be “Attribute”, “Technical”, “Range” or “Consumption”.
Parent CWO	The parent component work order. This can be the CWO raised on the same component on which the current CWO is raised. This can also be the CWO raised on the parent component, in the component configuration hierarchy.
Parent Delivery Area Code	The code identifying the parent delivery area of the goods.
Parent Work Center #	A unique number identifying the parent work center.
Parent Work Center Description	The textual description of the parent work center.
Part #	The manufacturers’, suppliers’ or the industry standard identity for the subject part, assembly, kit or material item. Part Number when linked with its Manufacturer Code, provides a unique identity for the given item.
Part Account Group	A unique code identifying the account group under which the part is grouped.
Part Category	The user defined category to which the part belongs.
Part Classification	The classification of part, which could be “Rotable”, “Repairable” or “Controllable”.
Part Condition	The condition of the part which could be "New", "Overhauled", "Serviceable" or "Unserviceable". New – indicates that the part is new. Overhauled – indicates that the part is overhauled. Serviceable – indicates that the part is serviceable. Unserviceable – indicates that the part is unserviceable.
Part Control Type	The type in which the part is controlled in the warehouse, which could be "Lot Controlled", "Serial Controlled", "Lot & Serial Controlled" or "None". Lot Controlled – indicates that the part is tracked with the help of the lot number to which it belongs. Serial Controlled – indicates that the part is tracked with the help of the serial number. Lot & Serial Controlled – indicates that the part is tracked with the help of both lot number and serial number.
Part Cost	The cost per unit of the part.
Part Description	A textual description of the part.
Part Failed Date	The date on which the part failed.
Part Identifier	The part on which the MCR must be executed, which could be "Internal" or "Supplier". Internal – indicates that the MCR must be executed on the part, which is already available with the operator. Supplier – indicates that the MCR must be executed on the part supplied by the supplier.
Part Ownership	The ownership of the part, which could be “Owned”, “Customer” or “Supplier”. Owned – Indicates that the login organization unit owns the received part. Customer – Indicates that the customer owns the part. Supplier – Indicates that the supplier owns the part.
Part Rating	The process of rating a supplier based on the performance pertaining to the supply of a particular part, and not on all the parts supplied.
Part Serial #	The serial number of the part.
Part Type	The type of the part which could be "Raw Material”, “Component”, “Expendable”, “Tool”, “Consumable”, “Kit” or "Miscellaneous".
Parts Expense Basis	The basis for evaluating parts expense in the inventory, which could be one of the following: Expense At Issue – Indicates that after the first issue, the part is maintained at zero cost, and the cost of the part is charged to the aircraft only for the first issue of the part from the aircraft. Expense At Retirement – Indicates that the part must be issued and maintained in the system based on the “Valuation Method” set for the part. The cost of the part is charged to the aircraft every time the part is issued from the aircraft and the cost is reversed when the part is returned. The part will be expensed out of the system when it is scrapped.
Pay Term	A unique code identifying the payment term.
Pay Term Type	The type of payment term, which could be “Advance” or “Net”. Advance – The payment (whole or part) is to be made in advance to the supplier. That is, it must be made before the delivery of the goods. Net – The payment will be made in installments to the supplier from a specified date within a specified period, with the installment dates and amount being fixed.
Pay To Supplier #	The pay to supplier is the supplier to whom the payment is to be made. This can be different from the supplier from whom the parts have been purchased.
Payment Currency	The currency in which the payment is made to the supplier.
Payment Priority	The priority of the payment, which could be “High”, “Normal” or “Low”.
PBH Agreement	Power By Hour Agreement. Under a PBH agreement, the vendor is paid based on the utilization of the aircraft instead of the parts purchase price.
PBH On	Indicates whether the PBH agreement is associated with the “Aircraft”, “Engine” or “Others”.
PC	Purchase Committee. PC is a group of authorizers who can authorize commercial documents. These members are simultaneous authorizers.
PC Maximum Value	The maximum value of a document that the purchase committee (PC) can authorize.
PC Minimum Value	The minimum value of a document that the purchase committee (PC) can authorize.
PC Type	The type of the purchase committee (PC) namely “Quorum”, “Any” and “All”. Quorum – The minimum number of authorizers in the purchase committee who need to authorize the document before it is routed to the next purchase committee or level. Any – Any authorizer in the purchase committee can authorize the document before it is routed to the next purchase committee or level. All – All the members in the purchase committee need to authorize the document before it is routed to the next purchase committee or level.
Penalty %	The penalty to be paid on payments made after the due date. The penalty amount is computed based on the due amount and the number of days the payment has been delayed, with respect to the due date.
Pending Issue Qty	The number of parts that are pending to be issued. This is calculated by subtracting the already issued quantity from the total quantity.
Pending Return Qty	The quantity of the part yet to be returned.
Per Asset Value	The cost per part.
Per Cost	The number of parts for which the cost is specified.
Percentage Completed	The percentage of work completed.
Period #	A sequential number generated by the system to identify the reliability period.
Physical Inventory	A method used by organizations for stock verification with a goal to maintain the minimum level of discrepancy between the system and the actual physical stock.
PI Plan #	Physical Inventory Plan Number. PI plan is a document that contains planning details for the physical inventory.
Picking Priority	The priority in which the parts must be issued from the zone or bins.
Picking Strategy	Indicates the applicable strategy to be used while parts are picked from the zones or bins for issuing. The different strategies are: Default Zone / Bin – Indicates that the stock must be picked from the pre-defined zone or bin. FIFO – Indicates that the stock must be picked on First In First Out basis. LIFO – Indicates that the stock must be picked on Last In First Out basis. Minimum Zone / Bin – Indicates that the stock must be picked from the zone or bin which has the minimum stock. Minimum Remaining Life – Indicates that the stock, which has the lowest balance shelf life, must be picked. Minimum Lot – Indicates that the stock must be picked from the lot, which has the lowest balance quantity. Max Remaining Life – Indicates that the stock, that has the maximum shelf life, must be picked. Maximum Zone / Bin – Indicates that the stock must be picked from the zone or bin which has the maximum stock quantity.
Piece Part	Piece Part is a maintainable item, and is a physical part in the aircraft/component structure, but is not classified as a component.
Placement Priority	The priority in which the parts, on receipt, must be placed in the zone or bins.
Placement Strategy	The strategy of placing stock in the zone or bin. Fixed Storage – indicates that the stock is to be placed in fixed zone or bin. Storage Proximity – indicates the placement of the stock is based on the proximity of storage, which could be “Near”, “Medium” or “Far”. Existing Stock Addition – indicates that the stock can be added to the existing stock available in zone or bin. Next Empty Storage – indicates that the stock can be moved to the subsequent vacant zone or bin. Manual – indicates that the stock can be placed manually.
Plan Demand Qty	The total quantity of parts for which plan demands exist in the system. A demand is ‘planned’ when it is not certain to happen. For example, estimation of work orders causes a ‘plan’ demand.
Plan Level	The storage location level at which the cycle count or physical inventory is planned.
Plan Receipt Qty	The sum total of quantity of parts that have recorded plan receipt entries into ‘Disposition’. A plan receipt entry is recorded in stock planning by a Purchase Request because the receipt of quantity against it is tentative.
Planner Group #	A unique number identifying the planner group. A planner group is a set of employees who are responsible for the planning of maintenance activities for a set of component(s). Typically planner groups will be identified with Planning Object Types (which could be a collection of ATA or Component Family) and/or Planning Object Numbers (the individual ATA Chapter numbers or Component Family numbers such as 'Engine Component' or 'System Component').
Planning Action	The method by which the part will be assigned to the work order or task, which could be "Reserve" or "Unreserve". Reserve – indicates that the parts are reserved for the work order or task. Unreserve – indicates that the parts are not reserved for the work order or task.
Planning Base	The location or organizational unit that owns the aircraft or component.
Planning Object #	The number identifying the planning object such as ATA number, Component ID, Component Family ID or Part number, for which the maintenance planning is to be done.
Planning Object Type	The type of the planning object such as "Part #", "Component", "ATA #" or "Component Family" on the basis of which planning is done and planner groups are formed.
Planning Status	Status of planning information of the part, which can be "Fresh" or "Active". Fresh – indicates that the part information reference details are active but the planning details are not complete. Active – indicates that the part information planning details are complete. A part can be used in inventory transactions only when it is in the “Active” planning status.
Planning Type	The method in which the part requirement is planned. This could be "Reorder Level", "Min-Max", "Disposition" or "None". Reorder Level – indicates that the purchase activity is automatically initiated by the system, when the stock level falls below the fixed reorder quantity. Min-Max – indicates that a purchase activity is automatically initiated by the system, whenever the stock on hand falls below the minimum level. Disposition – indicates that a repository of expected supplies is maintained. Based on the consolidated requirement for future demand and supply, the purchase activity is initiated.
PO Additional Charges	The additional charges incurred in purchasing the parts, such as taxes, charges and discounts.
PO Basic Value	The basic value of the purchase order. This is calculated as the sum of the basic value of all the parts that are ordered.
PO Covered Qty	The quantity of parts, for which the purchase order is being created with reference to the requested quantity.
PO Currency	The currency in which the purchase order is raised.
PO Line #	The unique line number of the part in the purchase order.
PO status	The status of the purchase order, which could be “Draft”, “Fresh”, ”Open”, “Hold”, “Short Close”, “Cancel”, “Partially Amended”, “Amended”, “NT Close”, “Under Authorization” or “Closed”.
PO Total Value	The total value of the purchase order. It is the sum of the basic value and additional charges.
PO Type	The type of the purchase order, which could be one of the following: General – The purchase order, which can have any stockable items. Express – The purchase order raised in the case of urgent situations. For example, you can create a PO, against a supplier, for a part that is not mapped to that supplier. Consignment – The purchase order raised for parts to be stored by the supplier in the customer’s warehouse. Exchange – The purchase order raised for components for which core should be exchanged. PBH – The purchase order raised for parts, which are covered under PBH agreement. PBH Exchange – The purchase order raised for components, which are covered under PBH agreement. In this type of purchase order, core is exchanged for the ordered part. DropShip – The purchase order raised for a high value item, where you specify the location other than the defined location, to deliver the shipment. Sample – The purchase order raised for sample parts. The supplier can supply these parts free of cost.
Poolable	Indicates that the part belongs to a common storage from where the various organization units can use it.
Pooled	Indicates that the part is obtained from the common storage.
Position	A predefined slot in an organization, which is a combination of a department and a job.
Position Code	A number by which positions of components, assemblies or sub-assemblies on the aircraft are identified. The aircraft configuration could have various levels, and position codes are unique at any given level. In the Human Resource Management Process, the position code indicates the code identifying the position of the person in the organization.
Position Control ID	A number or code that uniquely identifies a predefined slot for a department and job. An employee is assigned to each position control ID. Even if the employee is transferred, the Position Control ID remains and can be assigned to another employee.
Position Formula	The formula associated to the position code. This formula is considered for calculating the component position parameter values.
Position Type	The type of the position to which a part, component or assembly could be attached. The position types could be "Engine", "APU", “Landing Gear” or “Others”.
Positive Tolerance	The tolerance indicates the limits for the parameter value or the execution date within which the maintenance activity is to be performed. The ‘Positive Tolerance’ indicates the upper limit within which the maintenance work units must be performed. This is considered as concessional limit.
Post Order Lead Time	The time between the date of ordering and the date of supplying.
PR Type	The different types of purchase requests namely “AOG”, “Critical”, “Expedite” and “Normal”. AOG – PR raised on the aircraft on ground. This is the situation where the parts have to be purchased immediately because the aircraft is grounded for maintenance and there is a shortage of parts. Critical – Purchase request raised for a part without which an urgent maintenance activity cannot be carried out. Expedite – Purchase request raised for urgent stock replenishment of parts. Normal – Purchase request raised for normal stock replenishment of parts.
PR Value	The total value of all the parts specified in the purchase request document.
Pre Order Lead Time	The time required for pre-order processing.
Precedence CWO #	The component work order (CWO), which must be executed simultaneously with the current component work order. A CWO can be executed only if its Precedence CWO (if any) is started for execution.
Preferred Model #	The number identifying the aircraft model identified as the model preferred for flight assignment, in case the default model is not available.
Preferred Supplier	The preferred supplier, from whom the material or the part will be purchased.
Prefix	A prefix for the numbering type. The prefix precedes the numbering type and is given for easy identification of the document number.
Pressure Altitude	The altitude above sea level measured by comparing with the pressure at sea level.
Previous Part #	The part that was previously attached to the position code.
Price Held Firm Time	The validity time frame given by the supplier for the quotation.
Price Rating	The criteria considered for computing supplier rating, for comparing the prices for a part offered by a supplier with the minimum of the prices offered by other suppliers or the market price.
Primary Skill #	The code that identifies the primary skill of the employee.
Primary Work Center #	The work center, which is responsible for the component work order execution.
Prime Part Number	The part, which is most widely used and is latest in the group of alternate parts.
Priority #	The unique code that identifies the priority of the maintenance activities. Priority codes identify the level of urgency with which an activity has to be executed.
Problem Demand	Demands, which cannot be reserved because of non-availability of receipts to satisfy the same.
Problem Quantity	The number of parts that would not be available for carrying out the work order or task on the planned start date.
Process Action	The action recommended for the defective component, which could be "Ready for Service", "To Repair" or "To Scrap". Ready For Service – indicates that the part is ready for service. To Repair – indicates that the part must be repaired. To Scrap – indicates that the part is unusable and must be sent to scrap.
Process Order Lead Time	The time taken to process an order.
Process parameter	The basic parameters, which drive the business process flow.
Productivity Factor	The number that indicates the efficiency of the facility object or the employee.
Program Category	The category of the maintenance program.
Program Revision #	The revision number of the part maintenance program.
Proximity Indicator	The relative position of zones or bins, which could be “Near”, “Medium” or “Far”.
PRR	Premature Removal Rate. The premature removal rate of a component is the number of removals of an item expressed in terms of a base period; usually per 1000 aircraft hours or 1000 engine hours. It is calculated for equalized sub periods into which the Reliability period is divided. The PRR for the reliability period equals the sum of the PRR for the sub periods.
Purchase Lead Time	The minimum time required by the supplier, from the time of order, to supply the items.
Purchase Order (PO)	A document for the procurement of parts. PO acts as an agreement with the supplier for procurement of materials as per the requirement.
Purchase Request #	A unique number identifying the purchase request for procuring the parts. Purchase request is raised for the procurement of material by the various organization units. The purchase request enables an organizational unit to initiate requirement of material or goods for consumption or sales.
Purchase UOM	The unit of measurement in which the part is purchased in a location.

QC Clearance Required	Indicates that the part requires a quality control (QC) clearance.
Qty Reserved By Plan Demands	The quantity of parts for which the firm receipt is reserved by planned demands.
Qty Reserved with this Receipt	The quantity of parts for which the demand is reserved against a particular receipt.
Qualification	The academic achievement of the employee.
Qualitative Value	The standard value of the quality attribute.
Quality Attribute	The parameter for the inspection of the part, which could be “Standard”, “Customized” or “None”. Standard – The part must meet the quality requirements as specified by the standard values of the attributes. Customized – The user can specify values for the attributes of the part to which the supplier must adhere.
Quality Rating	The criteria for computing supplier rating based on the quantity of items that are rejected as compared to the total quantity received and the number of problematic schedules.
Quantitative Value	The standard value of the quantity attribute.
Quantity / aircraft	The total quantity specified for the part in the aircraft configuration.
Quantity / Assembly	The total quantity specified for the part in the assembly.
Quantity Price Break	The breakup of the different rates for the different ranges of part quantities.
Quarantined Qty	Parts that have not been accepted or rejected. This could be due to various reasons such as non-availability of certificate, slight damage etc.
Quick Codes	The user-defined values that are used to categorize details based on certain characteristics.
Quotation	Quotation is a document issued by the supplier to quote the price, availability and other terms of the requested parts.
Quotation Type	The type of the quotation, which could be “Normal” or “Price List”. Normal – When the supplier replies to the RFQ sent by the organization against a specific requirement. Price List – When the supplier sends a Price List periodically for his products or services. This is normally valid for a specified period such as one year, six months etc. This can be the base document for placing Purchase Orders while purchasing materials. This type of quotation need not have any reference to RFQ.

Range Parameters	Range parameters are parameters, the values of which fall within a specified range. Range parameter values are indicative of the entity’s condition – an actual value outside the specified range can be indicative of a malfunction.
Rating #	A unique number identifying the supplier rating document.
RCA Ref #	The unique number identifying the reference document for preventable occurrences.
Reason #	A unique number identifying the reason.
Reason Code	The code identifying the reason. Reason codes are user-defined values, which are used to classify the various reasons for rejecting or quarantining parts that are supplied by a supplier.
Reason Code Type	Indicates the type of the reason code, which could be “Rejection” or “Quarantine”. Rejection – Used to define the reason for rejecting the parts. Quarantine – Used to define the reason for quarantining the parts during the goods receipts process.
Receipt #	The unique system-generated number identifying the receipt.
Receipt Horizon	The interim time interval between two purchase requests for the part.
Receipt Satisfactory	The status that is reported while acknowledging the receipt of parts. The status could be ‘Yes’ or ‘No’. When the status is ‘No’, the receiver must qualify the discrepancies noted.
Receipt Tolerance	The maximum excess or deficit allowed in the quantity received in comparison to the quantity ordered for the part.
Receipt Type	The type of the receipt, which could be “Normal”.
Receipt Warehouse #	The number identifying the warehouse where the part must be received.
Received Part #	The part number received from the supplier.
Received Qty	The quantity of parts received from the supplier.
Recertification period	The period during which the re-certification has to be done.
Recommended Use	The action recommended for the part that should be replaced. The recommended action could be "Discard", "Rework", or "Others".
Recording Station	The station where the journey log is recorded in the system.
Recount Mandatory	An option to indicate whether recounting of stock is mandatory or non-mandatory.
Recount Qty	The quantity of parts recounted during the physical inventory counting or cycle counting.
Recount Tolerance In %	The minimum adjustment tolerance level in percentage, below or equal to which no recounting is required for the existing discrepancy.
Recount Tolerance In Units	The minimum adjustment tolerance level in units, below or equal to which no recounting is required for the existing discrepancy.
Ref Document #	The number identifying the reference document.
Ref Document Currency	The currency in which the reference document deals.
Ref. Document Line #	The line number in the multiline in which the part number is available in the reference document.
Reference Doc Type	The unique code that identifies the reference document type. Reference documents are basically manuals provided by the original equipment manufacturers (OEMs). These manuals or documents are used by other business components for maintenance procedures.
Reference EO #	The number identifying the engineering order that initiated the part replacement in the position code.
Reference Status	The status of the reference information of the part, which can be "Under creation" or "Active". Under Creation – indicates that the part details are not complete. Active – indicates that the part details are complete. A part can be used in inventory transactions only when it is in the “Active” status.
Re-Forecast Impact	The result of re-forecasting a component maintenance schedule. The impact could be ”Scheduled Earlier” (if re-forecast schedule date is earlier than the original date), ”Scheduled Later” (if re-forecast schedule date is later than the original date) or ”No Impact” (if re-forecast schedule date is the same as the original date).
Reg. Implications	The implications or the suggestions recommended in the regulatory directive regarding the MCR execution.
Register #	The register number identifying the regulatory directive.
Regularize Leave / Attendance Changes	After the employees’ attendance is processed and authorized, the leave the employee availed during this period could get authorized. If the “Regularize Leave/Attendance Changes“ option is enabled, the system will reprocess the employee’s attendance for the same period taking the authorized leave into account, without the need to first unauthorize the originally processed employee attendance.
Regulatory Authority	Regulatory Authorities are the statutory bodies responsible for the laying down, implementing and monitoring of standards regarding air-worthiness of the aircraft, safety operations of the aircraft, certification of air operators and formulation of aviation legislation.
Rehire details	A separated employee can be rehired into the organization. The rehire details should be maintained as part of employee information.
Reimbursed	The amount reimbursed by the supplier regarding the claim.
Reimbursement Limit (%) of Part Cost	The percentage of the reimbursement limit with respect to part cost.
Reimbursement Type	The method in which the claim amount will be reimbursed. This could be "Cash", "Credit" or "Others". Cash – indicates that the claim amount will be reimbursed in the form of cash. Credit – indicates that the claim amount will be reimbursed in the form of credit. Others – indicates that the claim amount will be reimbursed in any form other than cash or credit.
Reject Reason #	The reason for the rejection of component warranty claim raised on the component.
Relationship Type	The type of the relationship between the primary task and the dependent task. The relationship could be one of the following: Start-Start – In this type of relationship, the execution of the primary task and the dependent task begin simultaneously. Start-Finish – In this type of relationship, the dependent task is triggered after the execution of the primary task has begun, and is completed before the primary task execution is completed. Finish-Start – In this type of relationship, the dependent task is triggered only after the completion of the primary task. Finish-Finish – In this type of relationship, the primary task and the dependent task are completed at the same time, irrespective of when the primary task or the dependent task was triggered.
Release Slip #	A unique number that identifies the release slip. Release Slip (RS) is an ordering document like Purchase Order (PO), which is used to place orders on a supplier against long-term contracts or agreements such as a Blanket Purchase Order.
Reliability Calendar Code	A unique code identifying the reliability calendar.
Reliability period	The reliability year defined for calculating Reliability Alert value for ATA system and component part number.
Rem Confirmed By	The name of the user who confirmed the component removal transaction.
Rem Confirmed Date	The date on which the component removal was confirmed.
Remaining EC	The engine cycles remaining before which the carried forward item must be replaced or repaired.
Remaining EH	The engine hours remaining before which the carried forward item must be replaced or repaired.
Remaining FC	The flying cycles remaining before which the carried forward item must be replaced or repaired.
Remaining FH	The flying hours remaining before which the carried forward item must be replaced or repaired.
Remaining Life	The remaining life of the component. The value is calculated as the difference between the ultimate life value and the present value of the parameter.
Remedial Action	The action that is recommended for rectifying the defect in the component.
Removal Type	The type of the component removal, which could be “Scheduled”, “Unscheduled” or “Others”.
Remove Quantity	The number of parts that you wish to remove from the component work order.
Rental Receipt	A document created when the operator receives a rented part from the customer and moves it back to the inventory.
Reorder Activity at	The place from where the part is reordered, which could be “Location” or “Warehouse".
Reorder Activity by	The process through which the part must be reordered. The reordering could be done through a “PO” (Purchase Order), “PR” (Purchase Request), “Release Slip” or “Stock Transfer".
Reorder Level	A fixed quantity level of the part below which, the purchase activity is automatically initiated by the system.
Reorder Qty	The quantity for which the order must be placed, when the reorder level is reached.
Repair/Make Qty.	The quantity of parts that is to be repaired or fabricated.
Repair Agency	Indicates that the supplier can carry out repairs of components.
Repair At	The location in which the component will be repaired. This could be "Supplier", "Third Party" or "In-house". Supplier – indicates that the component will be repaired in the supplier's location. Third Party – indicates that the component will be repaired in the third party's location such as authorized repair shop of the supplier. In-house – indicates that the component will be repaired in the airline operator's premises itself.
Repair Order #	A unique number identifying the repair order. A repair order is raised when a part or component is to be repaired by a repair shop.
Repair Process Code	Specifies the type of repair applicable for a subject part. Repair could be of the type “Overhaul”, “Repair”, “Test”, “Calibration”, “Shelf Life Renewal”, “Mod” etc.
Repair Shop	The name of the shop where the repair is carried out.
Repairable	An item comprising or including replaceable parts, commonly economical to repair, and subject to being rehabilitated to a fully serviceable condition over a period less than the life of the flight equipment to which it is related.
Repeat Fixed Interval	The interval after which the work unit in a maintenance program must be repeated, irrespective of whether its previous execution is completed or not.
Repeat Floating Interval	The interval after which the work unit in a maintenance program must be repeated, from the period of its last execution and completion.
Repeat Interval	The interval in which, the task for the consumption parameter is to be repeated.
Repeat Interval(Days)	The interval in which the task must be repeated, in the case of recurring tasks.
Repl Confirmed By	The name of the user who confirmed the component replacement transaction.
Repl Confirmed Date	The date on which the component replacement was confirmed.
Replacement Type	The type of replacement that the part must undergo, which could be “LRU” or “SRU”. “LRU” is a unit that can be readily changed on an aircraft during line maintenance operations and “SRU” is a unit that can only be changed during heavy maintenance or shop maintenance.
Reporting Date	The date on which the journey or technical log is reported.
Reporting Station	The station where the technical log is reported on a sheet.
Reporting Time	The time at which the journey or technical log is reported.
Reporting Time Zone	The time zone in which the journey log is reported.
Request Matrix	A setup that facilitates listing of warehouses containing free quantity of requested part in case the part requested through a material request, of “Normal” or “AOG” priority, is not available in the requested warehouse.
Request Status	The status of the ESR, which could be “Confirmed”, “Cancelled”, “Pre-Closed”, “Closed” or “Response Declined”. Confirmed – The status of the ESR upon confirmation. Cancelled – The status of the ESR upon cancellation. Pre-closed – The status of the ESR, when the engineering department has closed or terminated the ESR without releasing an EAN. The ESR may be pre-closed for reasons such as the engineering department is not in a position to clarify the request or when there has been an official communication released earlier, due to which the need for the request is irrelevant. Closed – The status of the ESR, when the engineering department has initiated some action on the request, either by creating an Engineering Advice Note, or by providing reference to an existing Engineering Advice Note, or by revising an EAN. Response Declined – The status of the ESR, when the user who raised the request, declines the response (EAN) from the engineering cell.
Requested Part #	The number identifying the part that is requested.
Requesting Location	The organizational unit that raised the request.
Requesting Org. Unit	A unique description of the organizational unit, which raised the request.
Re-Schedule Count	The number of times the work order or task has been re-scheduled.
Reservation Horizon	The number of days for which the part can be reserved for supply.
Reserved Quantity	The number of parts that are already reserved for the work order or task.
Resolution #	The number identifying the resolution document. Resolution document signifies the document used to resolve a discrepancy. Technical Log, Hangar Work Order and Component Work Order are some examples of resolution document.
Resolution Doc. Type	The type of resolution document, which could be Component Work Order, Hangar Work Order or Flight Log.
Resolution Procedure	The procedure to be followed for resolving a discrepancy reported against a component. Normally, the resolution procedure contains the work units that must be executed on the component to resolve the discrepancy.
Resolution Type	The type of resolution for a discrepancy, which can be “Corrective” or "Repetitive”. “Corrective” - Used when the resolution procedure must be executed only once, on the component for which the discrepancy has been reported. “Repetitive” - Used when the resolution procedure must be executed more than once at regular intervals.
Resource #	A unique number identifying the resource. A Resource can be defined as a skill or craft required to carry out a task. Alternately, it could be a tool or some other piece of machinery required to execute a task.
Resource Cost	The unit cost of the resource per hour.
Resource Group	The resource group, such as mechanic, inspector or others, to which the employee belongs.
Resource Last Updated	The date on which the resource is last updated for the component work order or task.
Resource Type	The type of the resource, which could be “Skill”, “Equipment”, “Tools” or “Others”.
Retrofitment	To provide an aircraft with parts, devices, or equipment not in existence or not available at the time of original manufacture.
Return #	A unique number identifying the stock return document.
Return Basis	The basis on which the part must be returned, which could be "Core", "Excess" or "Returnable". Core – Return basis will be ‘Core’, when a component is issued to maintenance. In this case, the Stores Department expects the core component, perhaps in unserviceable condition, to be returned. Excess – Return basis shall be ‘Excess’, when excess quantities of the stock such as consumables, must be returned. Returnable – Return basis will be ‘Returnable’, when the component must be compulsorily returned. For example, while issuing tools and equipment, the return basis will be designated as ‘Returnable’.
Return Date	The date on which the parts are returned to the stores.
Return To Service	Indicates that the component is attended only for the snag reported or inspection failure and brought back to its working condition.
Return Type	The type of stock return, which could be “Maintenance" or "General".
Returned From	The organization unit from where the parts are returned.
Returned Qty	The quantity of parts returned to the supplier or warehouse.
Revaluation #	A unique number identifying the standard cost revaluation document. Revaluation is performed when the standard cost must be modified for a part.
Revise Estimate	The estimated quantity of part, or estimated time of the resource, or the estimated elapsed time required for completing the access panel task.
Revised By	The name of the user who revised the document.
Revised Date	The date on which the document was revised.
Revision #	A unique number identifying the revision made to a document or a data entity.
Revision Date	The date on which the document or data entity is revised.
RFQ	Request For Quotation. RFQ is a document that is sent to the suppliers to communicate the requirements. The RFQ may or may not be based on a purchase request.
RO type	Repair Order type. The repair order could be of type “Normal” or “Exchange”. Normal – The type of repair order in which the component sent for repair is returned to the owner after due repairs. Exchange – The type of repair order in which the unserviceable part is exchanged for a serviceable part.
Rogue Unit	The rogue unit is a specific line replaceable unit, which repeatedly experiences short service periods, manifesting the same system fault every time, and whose replacement resolves the system malfunction. The rogue unit can be identified in terms of various performance parameters in the system. For example, the rogue unit may be defined as a unit that has three premature removals accumulating less than 500 hours of aircraft operation, or a total of five removals within a 12-month period. It could also be defined in terms of MTBUR.
Rota Plan	A master plan targeted for a specific category of employees, based on which schedules will be later created for these employees. Examples of categories of employees are Workers, Staff and Managers. This plan consists of: i) the entire list of shifts pertinent for the category of employees ii) the holiday master containing the list of applicable holidays iii) the attendance rules and policies that will govern the handling of attendance.
Rota Schedule	A work agenda for employees of a specific category, such as Workers or Staff. It specifies a list of shifts in a given order, with the duration of each shift in terms of number of days; the list of shifts is cyclic. Essentially, the shifts in a rota schedule are derived from a rota plan. When this rota schedule is applied to individual employees, it constitutes the employee’s timetable.
Rotable	Component parts designed to be repaired and reused. Components such as aircraft wheels, avionics assemblies and built-up engines are considered as rotable parts.
Round Down	A method used to convert the fraction. Converts the decimal to a whole number that is lesser. For example, for the decimal 15.49, the round down will be 15.00.
Round Off	A method used to convert the fraction. Rounds up the decimal to the immediate whole number. For example, for the decimal 15.49, the round off will be 15.00, and for the decimal 15.56, the round off will be 16.00.
Round Up	A method used to convert the fraction. Rounds up the decimal to a whole number that is higher. For example, for the decimal 15.49, the round up will be 16.00.
RS Type	Release Slip type. The release slip could be of type “Normal” or “Express”. Normal – The release slip, which can have any stockable item. Express – The release slip raised in the case of urgent situations. For example, a release slip can be raised against a supplier, for a part that is not mapped to that supplier. The system will map the part to the supplier after creating the release slip.
Runway	A strip of level, usually paved ground, on which the aircraft takes off and lands.
RVSM	Reduced Vertical Space Minima. The goal of RVSM is to reduce the vertical separation above flight level (FL) 290 from the current 2000-ft minimum to 1000-ft minimum. This will allow aircraft to safely fly more optimum profiles, gain fuel savings and increase airspace capacity. An aircraft needs to be certified for RVSM to fly at a lower vertical space minimum at higher altitude.

Safety Stock	The quantity of the item that is stored in the location to meet the consumption rate fluctuations.
Saleable	Indicates that the part is for sale purpose.
Sales UOM	The unit of measurement in which the part is sold in a location.
SAT (Deg C)	Static Air Temperature.
Save Parameters for Processing	When batch processing is to be carried out, the parameters for which the batch of records should be processed, must be specified. For instance, it may be required to process the attendance for all the employees under a given scheduling unit, rota plan and rota schedule. The three parameters in this instance are scheduling unit, rota plan and rota schedule. When these parameters are saved, the system executes basic validations and prepares the records for batch processing. The save action generates the Session ID that can be used to track the status of the batch processing. The batch processing is triggered when the “Process” or “Authorize” pushbuttons are selected.
SB	Service Bulletin. SB represents the formal communication by an OEM to its customers regarding an engineering change that needs to be effected on an operating asset. Both the airframe manufacturer and the respective component manufacturers propagate SBs.
Sch Interruptions	The failures that result in a schedule interruption. Schedule interruptions include delays, cancellations, turn backs and diversions.
Schedule #	The sequence in which the parts are to be issued against task as enlisted in the reference document.
Schedule Remarks	Any remark or comment pertaining to the work order or task scheduling.
Schedule Shift on Holidays	An option to permit or disallow employee shifts to be scheduled on holidays. The system provides the options “Yes” and “No”.
Schedule Type	The schedule type for the compliance of the MCR or EO, which could be "One Time", or "Recurring". One Time – indicates that the document must be executed only once. Recurring – indicates that the document must be executed at repeated intervals.
Schedule Type	The delivery type of the part, which could be “Single” or “Multiple”. Single – Indicates that the part must be delivered in single shipment. Multiple – Indicates that the part can be delivered in multiple shipments.
SCO #	The unique number that identifies the subcontract order document.
SCO Type	The type of the subcontract order, which could be “Ad hoc” or “Service”. Ad hoc – Ad hoc orders refer to the procurement of non-codified items from the supplier. Service – Service orders refer to the procurement of services from the supplier.
Separation details	The details of the employees leaving the organization as a result of resignation, retirement or any other reasons. These details are maintained in the assignment information.
Seq #	The line number generated sequentially by the system.
Serial #	The serial number assigned to a component.
Service Area	The area in which the facility object or the employee can serve, which could be "Current Work Center", "Child Work Center" or "All Work Centers".
Service Desc	The description of the service for which the warranty is given.
Service Quality Rating	The criteria considered for computing quality rating based on the quality of the service provided.
Service Rating	The process of rating a supplier based on the performance pertaining to the supply of a particular service, and not on all the services supplied. This helps in rating suppliers who have performed relatively well on supplying a particular service.
Service Type	The type of service required from the supplier. Service type could be one of the following: Regular – Refers to an ordinary type of service in which a part is not necessarily sent for repair. For example, Plumbing Services and Cleaning Services. Activity – Refers to service performed as an activity on a part. For example, Calibration of a Tool. Conversion – Refers to service that involves the conversion of inputs issued to a desirable output.
Session ID	When batch processing is carried out, the system uniquely identifies each instance of batch processing and its output through a number called Session ID. The ID is generated when the user saves the parameters for processing.
Shelf life	The period for which the part can be maintained on the shelf without any deterioration of characteristics.
Shift	A specific period of time within the day or night, during which a group of employees must work. It consists of time segments called Work Sessions and Break Sessions.
Shift Deviation	Allocating the employee to a shift different from the original shift allocated to him/her. The shift deviation can be recorded for a single day or for any period.
Ship Core By	The method used to ship core, which could be “Air”, “Road” or “Rail”.
Ship Spares By	The method used to ship spares, which could be “Air”, “Road” or “Rail”.
Ship To	The organization unit to which the items must be supplied.
Shipment Tolerance	The maximum excess or deficit allowed in the quantity shipped in comparison to the quantity ordered by the customer.
Shipping Contact	The person to be contacted while shipping the components to the repair shop.
Shipping Cost #	The unique code that identifies the shipping cost. These codes are used to specify the payment method for the shipping cost in the various activities of the Purchase and Inventory related business components.
Shipping Method #	The unique code that identifies the shipping method. These codes are used while specifying the shipping method in the various activities in the Purchase or Inventory related business components.
Shipping Point	The location from where the goods will be shipped.
Sign Off Comments	Any additional remarks pertaining to the sign-off of the task or component work order.
Sign Off Date	The date on which the sign-off is done.
Sign-off Status	These are flags, for tasks and sub-tasks in the Component Work Order, ticked off by the certified mechanic or inspector to indicate whether the tasks stated in the work order are accomplished or not. Thus the sign-off status of the task could be “Yes” or “No”.
Since Inspection	The cumulative flying hours or flying cycles of the component, since its last inspection in the shop.
Since Last Installation	The cumulative flying hours or flying cycles of the component, since its last installation.
Since Last Shop Visit	The cumulative flying hours or flying cycles of the component, since its last visit to the shop for maintenance.
Since New	The cumulative flying hours or flying cycles of the component, since it is manufactured.
Since Overhaul	The cumulative flying hours or flying cycles of the component, since its last overhaul in the shop.
Since Repair	The cumulative flying hours or flying cycles of the component, since its last repair in the shop.
SITA / ARINC	The SITA / ARINC code is the ID that the supplier uses to communicate via SITA / ARINC.
Skill #	The code that identifies the primary skill of the employee. Skill denotes maintenance skill or craft required to perform the maintenance task or activities by the maintenance employees.
Skill Code	The code of the skill, which the employee possesses.
Skill Rate	Each skill will be associated with a rate, which will enable the planners to estimate the cost to perform a task with required skills.
Sl No Controlled	Indicates that the part is serial controlled. Serial controlled parts are the parts that are tracked by the serial number in the warehouse, when it is involved in different transactions.
Sl No Logic	The method used to generate the serial number for the part, which could be "Automatic Generation" or "Manufacturer Sl No". Automatic Generation – indicates that the internal serial number for the part is automatically generated by the system. Manufacturer Sl No – indicates that the internal serial number for the part is based on the serial number issued either by the manufacturer or by the user.
Sl No Type Num	The numbering type for the part serial number.
Source Document #	The number of the source document.
Source File Name	The name of the source document that must be uploaded.
Source of Installed Comp	The source of the incoming component, in a component replacement transaction. Cannibalization – Indicates that the installed component is taken from some other aircraft. Loan – Indicates that the installed component (in a component replacement transaction) is taken on loan from other operators. Pooling – Indicates that the installed component (in a component replacement transaction) is taken from the shared repository.
Source Path	The path from where the source file must be retrieved for uploading.
Source Type	The type of source from where a part can be obtained. Typical source types could be “Manufacturer”, “Supplier”, “Customer”, “Industry”, “Competitor” etc.
SP Applicability	The applicability of the standard procedure, which could be “Aircraft”, “Engine” or “Component”.
Span (in Months)	Span, here, refers to the average of the most recent K month values, where K is the span of the moving average. This is one of the methods often used for forecasting time series data. Large values for K give good results for very stable series. Smaller values are needed for series, which tend to change level frequently. Note: In our Aviation Solution, there is a provision to choose up to two span options. Hence the Span1 and Span2.
Span1 Moving Average	The moving average calculated as per the span chosen in the “Set Options” activity of the “Aircraft Reliability” business component. Note: In our Aviation Solution, there is a provision to choose up to two span options. Hence the Span1 moving average and Span2 moving average.
SPEC 2000 Code	The ID by which the supplier is identified in SPEC 2000.
Special Frequency Note	Any supplemental information regarding task frequency, when standard frequency or monitoring methods need additional information. The note can clarify frequency requirements other than a simple parametric or letter check limit.
Special Tools Details	Any other detail regarding the special tools required for the execution of MCR.
Sponsored	Indicates whether the qualification acquired by the employee was sponsored or not sponsored.
ST Seq #	The sequence number of the sub task within the work order.
Stamping on Component	The physical mark on the component to indicate that the component has been modified.
Standard Cost	The standard cost of the part. It is used for valuation purposes.
Standard Procedure	Standard Procedure is a collection of tasks grouped together to carry out a specific maintenance activity. Tasks, that have to be performed to resolve a problem in the equipment, and that needs to be monitored together, can be grouped into a standard procedure.
Standard Purchase Price	The standard rate of the part, when purchase requests or purchase orders are generated.
Standard Sales Package	The default quantity for selling the part from a location or organizational unit.
Standard Sales Price	The default price for selling the part from a location or organizational unit.
Standard Warehouse	The default warehouse in which the part will be stored.
Station	A stopping place along a route, especially a stop for refueling or maintenance.
Status	The current status of the document. Some examples of document status could be “Draft”, “Fresh”, "Active", “Inactive”, “Scheduled”, “Authorized”, “Short Closed”, “Closed” etc.
Status Attribute	Identifies various properties that can be assigned to the user-defined stock status. The properties that can be assigned are: Allocable – Indicates that the stock of this status can be allocated or assigned for issue against specific demand documents like work order. Stockable – Indicates that the stock of this status can be stored as inventory stock. Valuated – Indicates that the value of the stock of this status is taken into account as a part of inventory value. Physical Inventory – Indicates that the stock of this status is verified by Physical Inventory, that is, by counting the actual physical items. This is an activity that is performed once a year. Cycle Counting – Indicates that the stock of this status is verified by Cycle Counting, that is, these are stocks that are counted periodically through the course of the year, to ensure accuracy between the system and the physical stock quantities. Nettable – Indicates that the stock of this status is taken into account for disposition.
Std. Horizon (Days)	The number of days that indicates the span during which the sub fleet is effective for forecast.
Stock Conversion #	The unique number assigned to the stock status conversion document.
Stock Correction #	A unique number identifying the stock correction document. A stock correction document is created when there is a discrepancy between the quantity of stock maintained in the system and the physical stock in the inventory.
Stock Status	The status, which can be assigned to specific quantities of the stock, stored in Inventory. The stock status could be user-defined or predefined.
Stock Status From	The current stock status of the part.
Stock Status To	The stock status to which the part must be converted.
Stock Transfer #	A unique number identifying the inter-warehouse and intra-warehouse stock transfer.
Stock UOM	The unit of measurement in which the part is stocked across all locations.
Stock Update Mode	The mode in which stock must be updated, while transferring stocks across warehouses, which could be “Automatic”, “Manual” or “User-defined”. Automatic – While authorizing the Stock Transfer order, the issue and receipt transactions occur automatically and the corresponding documents (in authorized status) are generated. Further the stock gets updated at both the issuing and receiving warehouses as soon as the stock transfer is authorized. Manual – The issue and receipt transactions have to be generated manually and the stock gets updated only after the authorization of the issue and receipt documents respectively. User-defined – Indicates that the stock update mode is user-defined.
Storage Category	Indicates whether a storage address (warehouse / zone / bin) has to be exclusively used for storing a part or can be used for the storage of other parts as well. The storage category could be “Exclusive” or “Shared”. Exclusive – Allows only selected category of parts to be stored in the storage address (warehouse / zone / bin). Shared – Allows the storage of all types of parts in the storage address (warehouse / zone / bin).
Storage Rule	Indicates whether a part can be stored in a particular address or also in a different address. The storage rule could be “Only At” or “Also At”. Only At – indicates that the part can be stored only in the specified warehouse. Also At – indicates that the part can be stored in any warehouse.
Storage Type	The type of storage, which could be “Normal” or “Free”. Normal Storage Type – denotes storing of parts in zones and bins. Free Storage Type – denotes storing of parts in bulk in a warehouse, which do not include zones and bins.
Subcontract Receipt	The acknowledgement, by an organization, of non-codified (ad hoc) items received from a supplier against a subcontract order, or the acknowledgement of service subcontracting where there is no physical output.
Sub Fleet #	The unique number identifying the sub fleet. Sub Fleet is a logical grouping of aircraft that have a distinct identity and a fairly constant utilization.
Sub Fleet Security	Indicates whether security check is required or not required for modification of maintenance program associated to a sub fleet.
Sub Part #	The substitute part number for which the transaction details are displayed.
Sub period	The reliability year is subdivided into equal number of periods called sub period. Cumulative flying hours, removals, number of snags reported are consolidated sub period wise for calculating the alert value.
Sub Task	The sub task that has to be performed while executing a task.
Sub-Contracted	Indicates that the part has to be sub-contracted.
Substitute Qty	The total quantity of alternate parts requested.
Substitute Type	The substitute type for the part. The substitute type could be “Not Allowed”, “NHA” and “Specific Alternates”. Not Allowed – Indicates that substitution with the alternate part is not allowed for the requested part. NHA – Indicates that the alternate part is the next higher assembly for the requested part. Specific Alternates – Indicates that the alternate part is a specific alternate part for the requested part.
Suffix	A suffix for the numbering type. The suffix succeeds the numbering type.
Suggested Action	The suggested supplier action regarding the warranty action such as ‘Repair’, ‘Exchange’ etc.
Suggested part number	The part number suggested by the engineering order for creation.
Supplier #	The unique code that identifies the supplier.
Supplier Account Group	A unique code that indicates the account group under which the supplier is grouped.
Supplier Rating Type	The rating type for the supplier such as Part Rating, Service Rating or Overall Rating.
Supplier Response	Any response given by the supplier regarding the claim.
Supplier Status	The status of the supplier, which could be “Active”, “Inactive”, “Hold Pay” or “Hold Buy”.
Supplier Type	The type of the supplier, which could be “Normal” or “Miscellaneous”. Normal supplier – The supplier against whom a purchase order can be raised. Miscellaneous supplier – The supplier against whom a purchase order cannot be raised. Performs services like carrying / forwarding, special handling of parts.
Supplier Warranty Ref #	The number identifying the supplier warranty reference document containing the warranty coverage details.
System Quantity Display	An option to indicate whether to show or hide the system quantity of parts while entering the count results.
System Stock Quantity	The quantity of the stock as maintained in the system.
System Tracking Ref #	The unique number used to track the certification details of the part.

TACAN Channel	Tactical Air Navigation Channel for the Navigational Aid. A short-range, ultrahigh frequency, electronic air-navigation system that provides a continuous indication of bearing and distance to a station using common components for bearing and distance determination.
Tag #	Tag Number. In a component replacement transaction, the tag number refers to the number identifying the tag attached to the component removed from the aircraft. In the physical inventory and cycle counting context, ‘Tag’ refers to a physical document, which is used for the purpose of recording the details at the time of actual counting.
Tag Numbering Type	The numbering type to be used by the system for generating the tag number.
Tag Type	The types of tag, which could be one of the following: General tags - These are defined at the lowest address location for each part, that is, at the warehouse-zone-bin level. Bulk Tags - These are defined at the uppermost address location. Bulk-Storage Area Tags - These are ‘bulk’ tags defined for every storage area.
Tail #	Also known as aircraft registration number, the tail number is one of the identifiers of an aircraft.
Take Off Date & Time	The date and time of flight take-off.
Task	Task is the basic unit of maintenance work performed on the equipment. It is the primary work unit type.
Task Applicability	The applicability of the task, which could be, “Aircraft”, “Engine” or “Component”.
Task Classifier	Indicates whether the task is a new or an existing task.
Task Completed Date	The date on which the task is completed.
Task Execution Status	The status of the task execution, which could be either “Inprogress” or “Completed”.
TAT (Deg C)	Total Air Temperature. TAT refers to the temperature of static air plus the temperature of dynamic air.
TCD #	Tax, Charge or Discount. ‘TCD #’ is a unique identifier denoting the Tax or Charge or Discount. Tax – Charges levied by the government. Charge – Charges levied by other organizations. Example: Handling charge by a carrier. Discount – A reduction in price offered by the supplier by way of goodwill.
TCD Basis	The basis on which the TCD is calculated, which could be “Percentage”, “Unit Rate” or “Flat” amount. Percentage – The TCD is calculated as a percentage of the value. Unit Rate – The TCD is calculated as rate per unit per UOM. Flat – The TCD is calculated as a flat value.
TCD Rate	The rate at which the Tax, Charge or discount is calculated at per part level.
TCD Variant #	The code identifying the variant of the TCD.
Technical Log #	The number identifying the technical log. The technical log for the aircraft is created before the commencement of the journey. Technical Log is used to capture the discrepancy and its resolution.
Technical Specifications	These are static details such as the make, power rating, capacity, weight and dimensions of the maintainable entity. These parameters primarily describe the specifications of the aircraft or its component.
Terminating MCR	Indicates whether the MCR terminates one or more existing MCRs.
Terminating Value	The value of the consumption parameter based on which the task will be terminated.
Threshold	The next scheduled value for the execution of the MCR.
Threshold Date	The date by which the reported discrepancy must be resolved.
Threshold Interval	The interval at which the first execution of the work unit in the maintenance program takes place.
Threshold Value	The maximum number of days or hours within which, the task for the consumption parameter, is to be carried out.
Time Deviation	Changing the timings of the shift, for employees. Time deviation is applicable for regular shifts only and not for flex shifts; time deviation is recorded for one day at a time.
Time Unit	The unit of measurement for time, which could be “Minutes”, “Hours” or “Days”.
Time Zone	Any of the 24 longitudinal divisions of earth's surface in which a standard time is kept, the primary division being that bisected by the Greenwich meridian. Each zone is 15° of longitude in width, with local variations, and observes a clock time one hour earlier than the zone immediately to the east.
Timetable	The work agenda generated by the system for every employee under a rota plan. It tells the employee of the specific shift, weekly off or holiday allocated to him/her on each day of a given period.
Tolerance %	The percentage of tolerance allowed for the supplied parts.
Tolerance Type	The tolerance type for the parts supplied by the supplier, which could be “Quantity”, “Value” or “Both”.
Tools	The instruments that are necessary to perform the maintenance tasks. A few examples are torque gauge and hydraulic test rigs.
Total Claim	The total amount claimed on the component.
Total Purchase Lead Time	The total lead time required for the purchase activity to be completed. The total lead time is the sum total of the pre order lead time, process order lead time and the post order lead time.
Trading Partner	The trading partner for the loan or rental transaction, which could be ‘Supplier’ or ‘Customer’.
Transaction #	The unique number that identifies the transaction.
Transfer Category	The category to which the stock transfer belongs.
Transfer Receipt #	The unique number generated by the system to identify the stock transfer receipt.
Transshipment	Transshipment is deviating the specified and agreed logistics route for the consignment to be brought in.
Triggering Parameter	The code identifying the parameter, which triggered a scheduled maintenance activity.
TSI	Time Since Inspection. TSI is the cumulative flying hours of the component since its last inspection in the shop or on-wing inspection in the aircraft in Hangar.
TSM	Trouble shooting manual. TSM, also referred to as Fault Isolation Manual, contains possible faults, which can be encountered during airline operations. The Original Equipment Manufacturers (OEMs) provide airlines with copies of these manuals.
TSN	Time Since New. TSN is the cumulative flying hours of the component since it is manufactured.
TSR	Time Since Repair. TSR is the cumulative flying hours of the component since its last repair in the shop.
TSV	Time since Visit. TSV is the cumulative flying hours of the component, since its last visit to the shop for maintenance.
Turn around time	The total time for which the component will be out of service, while it gets serviced. This is the sum of the ship-out time, elapsed time on maintenance activity and ship-in time.
Twin Position Code	The code identifying the twin position. Twin positions relate to aircrafts that are capable of undertaking extended operations. In order to increase the reliability of the aircraft, additional redundancies will be built up for critical components or equipments - twin positions identify these positions together with their redundancies. Maintenance activities are not planned on all the twin positions simultaneously. This is to preempt the chances of inferior workmanship / material reducing the overall system reliability.
Type Certificate #	A unique number identifying the Type Certificate. When a new aircraft model is produced and tested, it is issued a certificate by the airworthiness authority of the country of produce, that the aircraft has been produced as per type design. The certificate is known as Type certificate.

Ultimate Life	The life of the component if you have set the consumption parameter as the life parameter.
Ultimate Life Value	The value (parameter or calendar period) identifying the life of the component.
Unloading Document #	The number identifying the document, while unloading the stock in the warehouse.
Unplanned Receipt Transaction	A receipt transaction where the receipt is not against any reference document but raised for some emergency situations.
Unserviceable Routing WH #	The warehouse to which the unserviceable components or parts should be routed.
UOM	Unit Of Measurement.
UOM Code	A unique code identifying the Unit of Measurement.
Update Mode	The mode in which the parameter value is updated, which could be “Delta” or “New”. “Delta” indicates that the new parameter value is added with the existing parameter value; “New” indicates that the parameter value is overwritten by the new parameter value.
Updating Model Configuration	Refers to the time of affecting a change in the model and/or part configuration. The changes could be "Not Applicable at all", "Applicable after Release" or "Applicable after Execution". Not Applicable – indicates that the configuration need not be updated. After Release – indicates that the configuration must be updated after the release of the EO. After Execution – indicates that the configuration must be updated after the execution of the EO.
Uplifted Hyd Oil	The amount of hydraulic oil uplifted in the hydraulic tanks of the aircraft.
Usage For A/C #	The number identifying the account usage, which points to an “Account Code” where the financial postings will be done.
Usage For CC	The cost center usage (consumption point) for the item.
Used Quantity	The quantity of parts consumed for the task or component work order.
User Option Value	The unique code that identifies the user-defined option for a commercial document type. These user-defined values are later assigned to documents using these codes.
User Status	The user-defined status of the document.
UTC	Universal Time Coordinated. UTC is used as a reference time to create various time zones for airline operations.

Valuation Method	The method in which the costing of the part is done at an inventory location. The valuation method could be "Standard Cost", "LIFO (Last In First Out)", "FIFO (First In First Out)", "Actual Cost" or "Weighted Average Rate". LIFO – Indicates that the parts are issued at the latest price. FIFO – Indicates that the parts are issued at the earliest receipt prices. Actual Cost – Indicates that the receipts and issues of a part are always made at the actual cost. Weighted Average Rate – Indicates that the issue rate is calculated as the average of receipt values divided by the receipt quantity.
Variable Tab #	The variable tab number is one of the identifiers of the aircraft.
Variant Value	The TCD rate specified for the TCD Variant.
Visual Rejection Qty	The quantity of parts rejected after visual inspection of received goods.
Voice (Y / N)	An option to specify whether the Tactical Air Navigation (TACAN) has a voice channel or not. It is an attribute of a TACAN channel.
Volume UOM	The unit of measurement in which the volume of the part is measured.

Warehouse #	The unique number identifying the warehouse.
Warehouse In-charge	The employee code of the warehouse in-charge, who is responsible for controlling the warehouse.
Warranty	An approved performance level of items or services supplied by a particular supplier to a customer.
Warranty Claim #	A unique number identifying the component warranty claim. A component warranty claim is a document raised on a component that has failed when it is under warranty. It contains warranty coverage information, defect details, and claim amount details.
Warranty End Date	The date on which the warranty coverage ends for the component.
Warranty Expiry Value	The threshold value of the parameter after which the warranty expires.
Warranty Labor Rate / Hour	The labor rate per hour that will be remitted by the supplier for a Warranty Repair.
Warranty Lapse Date	The date on which the warranty lapses on a part.
Warranty Reference #	A unique number identifying the component warranty reference. A component warranty reference is a document that contains the warranty coverage information defined for a component. The Warranty Clauses and Warranty Terms that are applicable for a particular component are identified as Warranty Coverage information. Typically, this could be the Warranty Agreement reached between the supplier and operator.
Warranty Start Date	The date from which the warranty coverage starts for the component.
Warranty Tracking	Warranty agreements between a Trading Participant and an Air Carrier may contain different and uniquely bargained terms. Such information may be supplied to cover one or more Manufacturer Parts, or one or more types of warranty (new part, overhauled part or repair part). The information may be supplied as a single or multiple documents covering all supplied occurrences of the Manufacturer Parts or may take the form of a specific document supplied with specific Manufacturer Part. Warranty tracking is the tracking of such warranty agreements.
Warranty Type	The type of warranty based on which the warranty details on a service are captured. The types could be "New", "OEM", "Overhaul" or "Repair". New – denotes that the warranty is given by the supplier. OEM – denotes that the warranty is given by the OEM. Overhaul – denotes that the supplier has given warranty for the ‘Overhaul’. Repair – denotes that the supplier has given the warranty for the ‘Repair’.
Warranty Value	Indicates the time in cycles or hours for which the supplier is willing to offer warranty.
Way Bill #	The unique number that identifies the way bill. Way bill is the document sent by the carrier along with the consignment delivered to the receipt location. It could have details like package type, weight, carrier details and vehicle number.
Weekly OT Limit Applicable	Indicates that there will be a ceiling on the number of hours per week for which an employee can avail overtime. The actual ceiling amount is specified in Maximum OT Hours/Week.
Weekly pattern	Weekly pattern is the combination of days in a week, identified as a pattern to be associated with flight assignment.
Weight UOM	The unit of measurement in which the weight of the part is measured.
Wet	A type of lease that indicates that the lessee would maintain the aircraft.
WH – Bin #	The number identifying the bin in the zone for a given warehouse.
WH – Zone #	The number identifying the zone in the warehouse.
Work Area	The physical location where the maintenance activity must be carried out.
Work Center #	A unique identifier for a work center. Work center is the basic unit responsible for carrying out maintenance work on the aircraft or its component. It may represent a pool of skilled personnel, with varied skill sets and facilities, which comprises equipment such as lathe shop, tools such as Torque Wrench, and ‘Others’ such as Hangars.
Work Center Capability Check	The option that indicates whether the work center capability for executing the work units must be checked or not.
Work Delay #	The unique number that identifies the work delay.
Work Package #	The unique number that identifies the work package. Work package is a collection of tasks and/or standard procedures, which have to be accomplished together.
Work Session	Refers to each time segment within a shift, during which employees work. Normally, a shift starts with a work session and alternates between work sessions and break sessions.
Work Unit #	A unique number identifying the task, standard procedure or the work package.
Work Unit Type	The type of the work unit, which could be “Task”, “Standard Procedure” or “Work Package”.

X Class

The percentage of total inventory value that corresponds to ‘X’ Class parts in the inventory.

Y Class

The percentage of total inventory value that corresponds to ‘Y’ Class parts in the inventory.

Zero Qty Parts

An option to include or exclude zero quantity stock in the counting cycle and Physical Inventory.

Zone #

A unique number identifying the various sections of an aircraft. Such division into various sections helps in component location and eases troubleshooting.

Zone Type

The type of the zone, which could be “Normal” or “Free”.

Normal Zone Type – denotes that bins can be defined within the zone for storing the parts.

Free Zone Type – denotes that parts are stored in bulk in the zone and does not include bins.