Maintenance Code - TM-55-4920-437-13-P0088

TM 55-4920-437-13&P

Code

Explanation

AO - (Assembled by

Items with these codes are not to be requested/requisitioned

org/AVUM Cate-

individually. The parts that make up the assembled item must be

gory)

requisitioned or fabricated and assembled at the category of

AF - (Assembled by

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

(DS/AVIM Cate-

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

gory)

code indicates the item is assembled at a higher category, order the

AH - (Assembled by

item from the hig her category of maintenance.

GS Category)

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 category(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 category authorized

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

of the following categories of maintenance.

Code

Application/Explanation

- 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 category can

remove, replace, and use the item.

- General support category can remove, replace, and use the

item.

C-3