Managing aircraft / component parameter values

Select the “Parameter” tab in the “Manage Aircraft / Component Records” page.

The “Parameter” tab appears.

Specific Search

In the Search input box, enter Part #, Serial #, Parameter or Parameter Description associated with the parameter for which you wish to view details.
From the adjacent drop-down list box, select Parameter Type. The drop-down list box displays the following: Consumption, Range, Attribute and Technical.
Click the button to retrieve the parameters that satisfy the search criteria in the multiline.

Note: 1. If the Maintenance object is Aircraft, the search will retrieve all the parameters associated to the aircraft. However, if 'Include Child' checkbox is also selected, the search retrieves all the parameters associated to the Aircraft and all its child components. 2. Similarly, if the Maintenance object is Component, all parameters associated with the component are retrieved. However, if 'Include Child' checkbox is also selected, all the parameters associated to the component and its child components are retrieved in the multiline.

Include sub-assemblies

To retrieve parameters of sub-assemblies of aircraft / component, select the “Include Child” check box.

Retrieved Parameter records

The multiline displays the following details of parameters retrieved for the maintenance object:

ERR	The error code, if the parameter update transaction has failed due to data error.
Aircraft Reg. #	The aircraft in context for which you wish to update/view parameter values. The aircraft could be one of the following: The selected aircraft If the maintenance object is Component, the aircraft to which the component is currently attached Blank, if the component is not attached to any aircraft
Component #	The component in context for which you wish to update/view parameter values.
Part #	The part # defined in the aircraft / component configuration.
Serial #	The serial # of the part defined in the aircraft / component configuration
Parameter	The parameter effective for the part, such as FH or FC. Click the data hyperlink to access the “View History of Parameter Value Update” page for complete details.
UOM	The unit of measurement for the parameter, such as Hours or Cycles.

Enter/update the following in the multiline.

Since New	The present value of the parameter (Decimal). Mandatory. You must enter a positive value though the value can be zero. Further, you can specify a fractional value only if the UOM for the parameter allows fraction. For Range parameters the Since New that you specify must be within the range as defined for the parameter in the Aircraft component. Similarly, for Attribute parameters the Since New value must be valid as defined for the parameter and the aircraft in the Aircraft component. If the “Parameter Type” is “Attribute”, ensure that the value is a valid attribute value as defined in the “Aircraft” business component. Help facility available, for parameters of type “Attribute”. Note: 1) If the parameter type is “Consumption” and “Update Option” is “New”, the “Since New” value must be greater than or equal to the “Since OH”, “Since Repair”, “Since Insp.” and “Since Last Shop Visit” values. 2) Note: When updating Since New, ensure that the following is not true: TSN < LPV NSV - TSN > Interval NSV - TSN > Threshold
Since Overhaul	The cumulative parameter value of the component since its last overhaul in the shop (Decimal). You must enter a positive value though the value can be zero. Further, you can specify a fractional value only if the UOM for the parameter allows fraction. You must leave this field blank, if the maintenance object is Aircraft Reg#. Further, this field is not relevant for parameters of Parameter Type “Attribute”, “Range” and “Technical”. Note that the Since Overhaul value must be less than Since New value. This field is mandatory, if you intend to specify Since Repair, Since Insp. and Since Last Shop Visit field.
Since Repair	The cumulative parameter value of the component since its last repair in the shop (Decimal). You must enter a positive value though the value can be zero. You can also specify a fractional value only if the UOM for the parameter allows fraction. You must leave this field blank, if the maintenance object is Aircraft Reg#. Further, this field is not relevant for parameters of Parameter Type “Attribute”, “Range” and “Technical”. Note that the Since Repair value must be less than Since Overhaul value. This field is mandatory, if you intend to specify Since Insp. and Since Last Shop Visit field.
Since Insp.	The cumulative parameter value of the component since its last inspection in the shop (Decimal). You must enter a positive value though the value can be zero. Further, you can specify a fractional value only if the UOM for the parameter allows fraction. You must leave this field blank, if the maintenance object is Aircraft Reg#. Further, this field is not relevant for parameters of Parameter Type “Attribute”, “Range” an “Technical”. Note that the Since Insp. value must be less than the Since Overhaul and Since Last Shop Visit values. This field is mandatory, if you intend to specify the Since Last Shop Visit field.
Since Last Shop Visit	The cumulative parameters of the component since its last visit in the shop. (Decimal) You must enter a positive value though the value can be zero. Further, you can specify a fractional value only if the UOM for the parameter allows fraction.. You must leave this field blank, if the maintenance object is Aircraft Reg#. Further, this field is not relevant for parameters of Parameter Type “Attribute”, “Range” and “Technical”. Note that the Since Last Shop Visit value must be less than Since Insp. Value.

Note: You can enter the “Since OH”, “Since Repair”, “Since Insp.” and “Since Last Shop Visit” values, only when the “Maintenance Object Type” is “Component”, “Parameter Type” is “Consumption” and “Update Option” is “New” or “Re-Initialize.

Update Date & Time

The date on and time at which you update parameter values.

By default, this field is set to the current date and time.

Note: This date must not be a future date.

Remarks

Any general comments pertaining to the parameter value update. If you do not specify remarks, the system sets this field to the remarks in the “Default Remarks” field.

It is mandatory to enter remarks here, if you have not entered remarks in the “Default Remarks” multiline.

Init. Value Unknown?

Use the drop-down list box to specify whether the “Since New” value is known for the component that is not in “New” condition.

Yes – Select this option, if the “Since New” value is not known.
No – Select this option, if the “Since New” value is known.

The system allows you to modify this field only if the Update Option is “Re-initialize”. The system sets this field to “No” by default, if the parameters are not initialized for the component.

The multiline displays the following:

Initialized Value	The value at which the parameter was initialized at the time of induction into operations.
Initialized Date / Time	The date on and time at which the parameter was initialized with a value.
Present Value (Since New)	The value of the parameter at the current date and time since the aircraft/component was inducted into operations.
Present Value (Since Overhaul)	The value of the parameter at the current date and time since the aircraft/component was most recently overhauled.
Present Value (Since Repair)	The value of the parameter at the current date and time since the aircraft/component was most recently repaired.
Present Value (Since Insp.)	The value of the parameter at the current date and time since the aircraft/component was most recently inspected.
Present Value ( Since Last Shop Visit)	The value of the parameter at the current date and time since the aircraft/component was most recently sent for a shop visit.
As of Date & Time	The date and time when the parameter value (Since New) was last updated.
Update Mode	The update mode for the parameter, such as Delta or New.
Parameter Type	The type of parameter, such as Consumption, Range, Attribute or Technical.
Life Parameter	Indicates whether the parameter is the life parameter. (Life parameter is the parameter in terms of which the lifespan of the component is estimated.) This field displays only if the parameter type is Consumption / Range.
Parameter Source	The source for the value of the parameter, such as “Flight Log”, “Manual”, “Parent” or “Calculated”.
Range From:	The minimum value for the parameter, if the parameter type is Range.
Range To:	The maximum value for the parameter, if the parameter type is Range.
Average Daily Utilization	The average daily utilization for the (consumption) parameter based on which the forecast factor is calculated.
Forecast Factor	The multiplication factor to forecast the maintenance activity for the (consumption) parameter.
Ultimate Life Value	The estimated life span of the component / aircraft in terms of the life parameter.
Rem. Life	The life span yet to elapse for the component / aircraft in terms of the life parameter.
Formula #	The formula to be associated with the parameter.
Formula Content	The expansion of the formula.
Parameter Description	The name of the parameter, such as Flight Hours, Flight Cycles, Engine Hours or Engine Cycles.
Warranty Tracking	Indicates whether warranty tracking is applicable for the parameter.
Parameter Update	Indicates whether parameter update is mandatory or not.
Position Code	The position code at which the component is attached in the aircraft.
Level Code	The level code at which the component is attached in the aircraft.
NHA	The next higher assembly / parent component of the component, which will be Aircraft Reg. # or Component #.
Message Center	The success/error message pertaining to the parameter details. The system displays this message for the records on using the Validate or Update Parameter Values pushbutton. The message in the message center determines the listing of records in the multiline. Those records that have error messages in the message center are displayed first in the order, followed by the records that have success messages. Those records that do not display error messages are inferred to be correct after verification by the system.

Entering Default Details

Specify the following fields to collectively update all the records in the multiline at once.

Update Date & Time

The date on and time at which the parameter value was updated.

By default, this filed is set to the current date and time.

Note: If the Update Option is 'New' or 'Delta' or 'Correction' and the parameter type is ‘Consumption, the update date & time must not be later than the re-initialized date and time.

Remarks

Additional information on parameter update applicable for all records in the multiline.

This field is mandatory, if you do not intend to specify remarks for parameters in the multiline. However, remarks that the users specify in the multiline overrides the default remarks.

Update Option

Use the drop-down list box to select the mode on which the parameter value has to be updated:

§ Delta – Select this option to indicate that the new parameter value is to be added with the existing parameter value. If Delta value for a parameter is updated to Aircraft or Component, the value gets inherited to its child components (if exists) if the Parameter Source for the child components is set as “Parent”.

§ New – Select this option to indicate that the parameter value is to be overwritten by the new parameter value. If new value for a parameter is updated to Aircraft or Component, if the new value entered is greater than the existing parameter value, then the difference in the value gets inherited to its child components (if exists) with Parameter Source as “Parent”. If the parameter in the multiline is 'Range'/'Attribute'/'Technical', the value selected in Update Option must be "New".

§ Re-Initialize – Select this option to indicate that the parameter value must be re-initialized.

§ Correction: Select this option to indicate that the parameter value must be rectified.

By default, the Update Option is set to “Delta”.

Note that the system automatically resets the present value of the component and its entire hierarchy of child components to the “Since New” that you specify, if the Update Option is “New” or “Delta”. Hence, it does not allow you to enter component records that share parent or child relationship in the multiline. On the contrary, when you have selected “Re-initialize” or “Correction” as the Update Option you can enter parent and child component records at the same time. The system sets the present value of the parameter to the Since New while the present values of child or parent components are not affected.

If the parameter is mapped to the “Hobbs Meter Reading” base parameter, the only Update Option “New” can only be selected.

Click the “Validate” pushbutton to verify the specified parameter values.
Click the “Update Parameter Values” pushbutton to save the parameter values.

The system performs the following:

Transferred aircraft: You cannot update parameter values for aircraft/components attached to aircraft transferred to another operating unit for maintenance. The system allows for parameter update upon return of the aircraft.

For the maintenance object ”Aircraft” or ”Component”, if the "Parameter Type" is "Consumption" and the "Update Option" is "New" or "Delta", the system ensures that the newly added record with the current transaction date & time as the "Update Date & Time" does not already exist in the "Parameter History". For the maintenance object ”Aircraft” or ”Component”, if the “Parameter Type” is “Consumption, “Update Option” is “Re-Initialize” and value is available in the “Update Date & Time” field”, then the system ensures that the “Update Date & Time” for the maintenance object and parameter combination is not later than the previous initialize date & time of the newly accessed record.
The system generates a transaction number for the newly added record using the valid numbering type that has been mapped and set as “Default” to the “Manual Update” transaction in the “Document Numbering Class” business component.
For the maintenance object ”Aircraft” or ”Component”, if the “Update Option” is “New” and the Parameter Type” is “Range”, “Technical” or “Attribute”,. the system updates the newly added record with the current transaction date & time as the “Update Date & Time” in the parameter history.
If the “Update Option” is “Re-Initialize” and “Update Date & Time” field is left blank, the system adds the delta values to the parameter value of the newly accessed record and updates the same as the present value.
If the “Update Option” is “Re-Initialize” and “Update Date & Time” field is entered, the system updates the previous initialize date & time “” with the “Update Date & Time” and adds the delta values existing as of date & time to the parameter value of the newly accessed record and updates the same as the present value.
If the Update Option is “Correction” and “Update Date & Time” field is entered, the system updates the present parameter value for the aircraft/component to the Since New value.
Sets the Next Due of the work unit to Next Schedule Value (NSV), if the Updation Basis is “Time Window” with schedule based on usage. The execution of the work unit can occur within or outside the tolerance limits. For example, if the work unit is next due at 6000FH, repeat fixed / floating interval is 600FH, tolerance limit is +/- 10FH, and the work unit is executed on any parameter value between 5990 FH to 6010 FH (both FH values included). Assuming, the work unit is executed at 6000 FH, the NSV is arrived at 6600 FH (6000 FH + 600 FH). When the execution of the work unit occurs outside the tolerance limits, the NSV is computed using the following logic,

NSV = Work Unit Execution FH + Repeat Interval.

For example, if the work unit is executed at 5989 FH or 6015 FH, the NSV will be 6589 FH or 6615 FH,

Sets the Next Due of the work unit to Next Schedule Date (NSD), if the Updation Basis is “Time Window” and schedule is date based. The execution of the work unit can occur within or outside the tolerance limits. For example, if the work unit is next due on 10/05/07, repeat fixed / floating interval is 20 days, the tolerance limit is +/- 3 days and, the work unit is executed on any date between 07/05/07 to 13/05/07 (both dates included). Assuming the work unit was executed on 10/05/07, the NSD will be 30/05/07. When the work unit is executed outside the tolerance period, the NSD is computed using the following logic,

NSD = Work Unit Execution Date + Repeat Interval.

For example, the NSD for a work unit executed on 05/05/07 or 14/05/07 will be 25/05/07 or 03/06/07.

Ultimately, the system sets the Next Due to NSV or NSD based on the “Sch. Exe. Rule”, which could be “Earliest’ or “Latest” as specified by the user, in the Aircraft Maintenance Program component.
If the ”Since New” parameter value is not known, the system updates the parameter value as follows:

§ If one of the “Since Overhaul", “Since Repair”, "Since Inspection" or "Since Last Shop Visit" fields is entered, the system updates the “Since New” field with the available parameter value.

§ If more than one parameter value is entered, the system updates the “Since New” field with the greatest of the available parameter values.

For the newly added record with parameter type as “Consumption” and update option as “New”:

§ If there is any record with “Update Option” as “New” in the parameter history, with transaction date & time later than the “Update Date & Time”, the system retains the present parameter value.

§ If there is no record with Update Option as “New” in the parameter history, with transaction date & time greater than the “Update Date & Time”, the system adds the delta values of the records with transaction date later than the “Update Date & Time” from the parameter history to the parameter value of the newly accessed record and updates the same as the present value.

For the newly added record with parameter type as “Consumption” and update option as “Delta”:

§ If there is no record with “Update Option” as New in the parameter history, with transaction date & time later than the “Update Date & Time”, the system adds the delta value of the newly accessed record to the present parameter value and updates the same as the present value.

If the “Parameter Type” is “Consumption”, “Update Option” is “New” or “Delta”, and if parameter present value is changed for the maintenance object and parameter combination, then the system inherits the delta parameter change to the child components.
If the “Maintenance Object Type” is “Aircraft” and if there are usage based schedules for the work units associated to the aircraft :

§ If there is change in the present value of the aircraft consumption parameter, and if the compliance date for the specified aircraft and work unit combination is later than the transaction date & time, as defined in the “Aircraft Maintenance Program Compliance History”, then the system calculates the present value as on the compliance date and updates the same as the “Last Performed Value”. If the schedule type is “Recurring” then the system updates the next schedule value based on the updated present value.

§ For the child components attached to the aircraft as on ‘Update Date & Time’, if the compliance date for the component and work unit combination is later than the transaction date & time, as defined in the “Component Maintenance Program Compliance History”, then the system calculates the present value as on the compliance date and updates the same as the “Last Performed Value”. If the schedule type is “Recurring” then the system updates the next schedule value based on the updated present value.

If the “Maintenance Object Type” is “Component” and if there are usage based schedules for the work units associated to the component:

§ If there is change in the present value of the component consumption parameter, and if the compliance date for the specified component and work unit combination is later than the transaction date & time, as defined in the “Component Maintenance Program Compliance History”, then the system calculates the present value as on the compliance date and updates the same as the “Last Performed Value”. If the schedule type is “Recurring” then the system updates the next schedule value based on the updated present value.

§ For the child components attached to the component, then the compliance date for the component and work unit combination is later than the transaction date & time, as defined in the “Component Maintenance Program Compliance History”, then the system calculates the present value as on the compliance date and updates the same as the “Last Performed Value”. If the schedule type is “Recurring” then the system updates the next schedule value based on the updated present value.

If the parameter value is re-initialized for the Maintenance Object, then update the next schedule value for the work units for which last performed value is not available in the maintenance program, as follows:

§ If the ”Threshold value” is available for the work units, then the system adds the re-initialized value to the threshold value and updates the same as the next schedule value.

§ If no ”Threshold value” exists and ”Floating Interval” is available for the work units, then the system adds the re-initialized value to the floating interval and updates the same as the next schedule value.

For offline aircraft / components attached to offline aircraft / components available in offline warehouse / component removed and pending for return from offline aircraft, the system does not allow parameter value update in main base (i.e. Usage Mode set as “Online” in Configurator” business component), if the ‘Update Option’ is “Re-initialize” or “New”.

Note: Aircraft is said to be offline if it is located in an offline field base i.e. ‘Mode of Usage’ defined as “Offline” in the “Aircraft” business component. ‘Mode of Usage’ could be “Online” or “Offline” to indicate whether aircraft is located in main base or offline base respectively.

‘Usage Mode’ is a process parameter defined as “Online” or “Offline” in the “Configurator” business component to indicate whether the user operates the system from the main base or offline base to record transactions.

The system does not allow the user to update the parameter value for the Aircraft / Component with Update Option as “New”, if the process parameter ‘Offline System Applicable?’ is set as “Yes” in the “Set Global Parameters” activity of the “Installation Parameter Setup” business component.

Parameter value update of Formula based parameter

If the parameters of the maintenance object “Aircraft” or “Component” are affected, and if the affected parameter belongs to the formula content of any of the formula based parameter, then the system updates the present value of the formula based parameter based on its Update Option.

For example,

If the affected parameter is P2, which is a part of the formula content “F1 = P2*P3” for the formula based parameter P1. If the update option of the formula based parameter (P1) is set as “New”, then the system updates the present value for the formula based parameter (P1) using the new values of the affected parameters.

If the update option of the formula based parameter (P1) is set as “Delta”, then the system updates the present value for the formula based parameter (P1) using the delta values of the affected parameters.

Edit Links

Prior to using the following links, select a record in the multiline.
Select the “Edit Consumption and Range Parameters for Aircraft” link to update consumption and parameter range values for the aircraft.
Select the “Edit Consumption and Range Parameters for Component” link to update consumption and parameter range values for the component.
Select the “Edit Consumption and Range Parameters for Part” link to update consumption and parameter range values for the part.

View Links

Prior to using the following links, select a record in the multiline.
Select the “View Aircraft Parameter Value” link to know parameter values of the aircraft.
Select the “View Component Parameter Value” to know parameter values of the component.
Select the “View Aircraft Parameter History” link to view the parameter value changes till date for the aircraft.
Select the “View Component Parameter History” link to view the parameter values changes till date for the component.

The "Parameter Values" tab enables you to record, update, view or delete parameter values mapped to an aircraft or a component. It mainly addresses the need of the Technical Records staff to access parameter values during the technical recording process cutting traversal to varied and multiple activities. Users may prefer to view parameter details of the maintenance object alone or its sub-assemblies too.