Build Model Configuration – A summary of the activity

Configuration represents the structure of the equipment. Aircraft configuration is the hierarchy of the position codes and part numbers representing the various systems of the aircraft. Position codes refer to the various positions in the aircraft structure, where rotables can be fitted. This logical structure, depicting the skeleton of the aircraft, is basically defined at the aircraft model level. The aircraft registration numbers associated to the model can inherit these logical structures. Once inherited, the logical structure becomes an independent entity for that particular aircraft, which means, the structure can be modified without affecting the structure from where it was inherited. Multiple configurations can be defined for a model. Rules can be defined for the position codes to specify the part numbers that can be fitted to them. The relationship, or the dependencies that exist among the various position codes in the aircraft model, can also be defined.

This activity allows you to define or modify the configuration details for aircraft models. A model configuration is uniquely identified using the aircraft model, configuration class and the revision number combination. A model configuration can undergo multiple revisions. The changes made to the model configuration can be tracked using the revision number.

Getting familiar with the pages inside

What you can do in this activity

Specify configuration details

Define position codes in the model configuration

Associate equipment category to position codes

Identify piece part list for model configuration

Define configuration specific intermixing rules

Identify ETOP twins for part numbers in model configuration

Identify interchangeable rules

Specify MEL details

Specify CDL

Specify additional information

Specify configuration details

• Use the “Select Aircraft Model” page to select an aircraft model for which the configuration detials must be entered.

• Use the “Build Model Configuration” page to enter the configuration details.

Define position codes in the model configuration

The position codes are the identifiers of the physical locations in the aircraft structure, where rotables can be fitted. These position codes help in tracking the history of the rotables attached to them at various points in time.

• Go to “Build Model Configuration” page.

• Enter the position code to be associated to the model configuration in the “Position Code” field.

Associate equipment category to position codes

You can identify the category of the cabin equipment that can be attached to the position code in the aircraft of the specified model.

• Go to “Build Model Configuration” page.

• Select the requisite equipment category from the “Equipment Category” drop-down list box.

Identify piece part list for model configuration

You can identify piece parts for the model configuration. Among the various part numbers associated or fitted to the aircraft, certain parts are identified as piece parts, which are defined in “Part Administration” business component. The position code details for the piece parts identified in the model can also be entered.

• Use the “Edit Piece Part List for Model” page to specify the piece part required for the model configuration.

• Use the “Edit Piece Part Position Information” page to enter the position details for the piece parts.

Define configuration specific intermixing rules

The intermixing rule defines the list of dependent position codes and the dependent part numbers for the reference position code and the reference part number. The rule depicts the dependencies that exist among the various position codes in a model, with respect to the part numbers that can be fitted in them. In other words, the intermixing rule states that, whenever the reference part number is fitted in the reference position code, the dependent position codes must have the associated dependent part numbers fitted in them.

• Use the “Edit Position Attributes” page to select the reference position code.

• Use the “Edit Part Intermixing Rules” page to define the intermixing rule for the reference position code.

Identify ETOP twins for part numbers in model configuration

ETOP twin position codes are the position codes that are parallel to a reference position code. This rule restricts any maintenance activity being carried out simultaneously in the reference position code and the twin position code. This is required to govern the reliability of aircraft while performing ETOP.

• Use the “Edit Position Attributes” page to select the reference position code.

• Use the “Edit ETOP Twin Positions” page to define the ETOP twin position codes for the reference position code.

Identify interchangeable rules

The parts interchangeability rule defines the list of alternate part numbers that can be placed in the reference position code, in place of the reference part number, if the reference part number is not available.

• Use the “Edit Position Attributes” page to select the reference position code for which alternate part numbers must be defined.

• Use the “Edit Part Interchangeability Rules” page to define the alternate part numbers for the reference part number.

Specify MEL details

Minimum equipment list (MEL) is the list of equipment approved by the aviation authority, which may remain in an unserviceable state under certain operating conditions, but still provide an acceptable level of safety in the operation of the aircraft. The MEL quantity for the part can be less than or equal to the total quantity specified for the part in the model. For every part, the position code details for the quantity included in the MEL can also be entered.

• Use the “Edit Minimum Equipment List” page to add or modify the details of the parts included in the minimum equipment list.

• Use the “Edit MEL Position Information” page to specify the exact position codes, of the part selected in the “Model Configuration: Minimum Equipment List” page, to be included in the MEL.

Specify CDL

Configuration deviation list is the list of secondary parts of the airframe and engine, which do not affect the flying of the aircraft. This list denotes that the aircraft can still fly without these parts, or with these parts in defective condition.

• Use the “Edit Configuration Deviation List” page to add or modify the details of the secondary parts included in the configuration deviation list.

Specify additional information

• Use the “Edit Notes” page to specify the additional information pertaining to model configuration.