Maintenance Code - TM-5-4120-377-24P0013

TM 54120377-24P

Explanation

Items with these codes are not to be requested/requisitioned

individually. The parts that make up the assembled item must

be requisitioned or fabricated and assembled at the level of

maintenance indicated by the source code. If the 3d position

code of the SMR code authorizes you to replace the item, but

the source code indicates the items are assembled at a higher

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

Explanation

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

below.)

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

Installation drawing, diagram, instruction sheet, field service drawing, that is identified by

Reciprocating Compressor manufacturer's part number.

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

CAGEC 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 7501.

(2) Maintenance Code. Maintenance codes tells 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 third position tells you the lowest maintenance level

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

indicate authorization to one of the following levels of maintenance.

Application/Explanation

Code

Crew or operator maintenance done within organizational or aviation unit maintenance.

Organizational or aviation unit category 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.