Maintenance Code - TM-9-4931-477-24P0005

TM 9-4931-477-24P

AO-(Assembled by Org

Level)

Items with these codes are not to be requested/requisitioned individually.

AF-(Assembled by DS

The parts that make up the assembled item must be requisitioned or

Level)

fabricated and assembled at the level of maintenance indicated by the

AH-(Assembled by GS

source code. If the 3d position code of the SMR code authorizes you to

Level)

replace the item, but the source code indicates the item is assembled at

AL-(Assembled by SRA)

a higher level, order the item from the higher level of maintenance.

AD-(Assembled by Depot)

XA - Do not requisition an "XA"-coded item. Order its next higher assembly. (Also, refer to the NOTE below.)

XB - If an "XB" item is not available from salvage, order it using the FSCM and part number given.

XC - Installation drawing, diagram, instruction sheet, field service drawing, that is identified by manufacturer's

part number.

XD - Item is not stocked. Order an "XD"-coded item through normal supply channels using the FSCM and part

number given, if no NSN is available.

NOTE: Cannibalization or controlled exchange, when authorized, may be used as a source of supply for items

with the above source codes, except for those source coded "XA" or those aircraft support items restricted by

requirements of AR 700-42.

(2) Maintenance Code. Maintenance codes tell you the level(s) of maintenance authorized to USE and

REPAIR support items. The maintenance codes are entered in the third and fourth positions of the SMR code

as follows:

(a) The maintenance code entered in the 3d position tells you the lowest maintenance level

authorized to remove, replace, and use an item. The maintenance code entered in the 3d position will indicate

authorization to one of the following levels of maintenance.

Code

Application/Explanation

- Crew or operator maintenance done within organizational or aviation unit

maintenance.

- Organizational or aviation unit level can remove, replace and use the item.

- Direct support or aviation intermediate level can remove, replace, and use

the item.

- General support level can remove, replace, and use the item.

- Specialized repair activity can remove, replace, and use the item.

- Depot level can remove, replace, and use the item.