Help on Substitute Part

Alternate part numbers are defined to reduce the maintenance related grounding time of an aircraft. Alternate part numbers are valid parts existing in the inventory. In case a part number required is not available at the site of maintenance, an equivalent part can be substituted to complete the maintenance activity. A part can be substituted with another part subject to interchangeability rules.

This Help page allows you to search and select a substitute part and transfer the same to the field in which it is required.

You can carry out the search using the substitute type, order of preference, substitute part number, substitute part description, alternate part type and the position code of the part. The system retrieves all the parts based on the search criteria entered. On confirmation, the selected part is transferred to the required page.

Click the lens icon positioned next to the “Substitute Part #” field in the main page.

The “Help On Substitute Part” page appears.

The system displays the following in the “Part Details” group box:

Aircraft Reg #	The number that identifies the aircraft for which the part is required.
Aircraft Model #	The number that identifies the model of the aircraft.
Requested Part #	The number that identifies the requested part.
Requested Part Description	The textual description of the requested part. Zoom facility available.

Enter the following fields in the “Search Criteria” group box, to search for a substitute part:

Substitute Type	Use the drop-down list box to select the substitute type of the part you wish to retrieve. The system displays “NHA” and “Alternate Part” by default. The system sets “Alternate Type” by default.
	Select “NHA”, if you wish to retrieve all the next higher assembly for the requested part.
	Select “Alternate Part”, if you wish to retrieve all the alternate parts for the requested part.
Order of Preference	The precedence accorded to the interchangeable part numbers based on which the reference part number is alternated (Alphanumeric, 6). The system retrieves all the substitute parts whose order of preference is similar to the value specified here. Leave this field blank to retrieve all the substitute parts irrespective of the order of precedence.
Substitute Part #	The code identifying the substitute part number you wish to retrieve (Alphanumeric, 40). You can enter the code in full or specify it partially using the “*” character. The system displays all the substitute part numbers that are similar to the value entered here. Leave this field blank to retrieve all the substitute parts.
Substitute Part Description	The description of the substitute part you wish to retrieve (Alphanumeric, 150). You can enter the description in full or specify it partially using the “*” character. The system displays all the substitute part whose part description similar to the value entered here. Leave this field blank to retrieve all the parts irrespective of the description. Zoom facility available.
Alternate Type	Use the drop-down list box to select the alternate type of the part you wish to retrieve. The system displays “Position Based Alternate” and “General Alternate”. Leave this field blank to retrieve all the parts irrespective of the alternate part type.
	Select “General Alternate”, if you wish to retrieve all the alternate parts of the required part.
	Select “Position Based Alternate”, if you wish to retrieve all the alternate parts for the required part in all the positions wherever it is attached.
Position Code	The code that identifies the position of the part in the aircraft (Alphanumeric, 25). You can enter the position code in full or specify it partially using the “*” character. The system retrieves parts with position codes that are similar to the value entered here. Leave this field blank to retrieve all the parts irrespective of the position.

Note: Leave all the fields blank, to retrieve all the substitute part numbers available in the database.

Click the “Search” pushbutton, to search for the substitute parts.

The system displays the following in the “Search Results” multiline, based on the search criteria entered.

Substitute Part #	The substitute part retrieved by the system.
Substitute Part Description	The textual description of the part.
Substitute Type	The type of the substitute part, which could be “NHA” or “Alternate Part”.
Alternate Type	The type of the alternate part, which could be “Position Based Alternate” or “General Alternate”.
Position Code	The code that identifies the position of the part in the aircraft.
Order of Preference	The order of precedence accorded to an interchangeable part based on which the part is alternated.

Check the box in the “Select” column of the multiline, to select a substitute part.
Click the “OK” pushbutton.