Maintenance Code - TM-55-1730-227-13-P0141

TM 55-1730-227-13&P

Code

Explanation

AO- (Assembled by

org/AVUM Level)

AF- (Assembled by

Items with these codes are not to be requested/requisitioned individual-

DS/AVIM Level)

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

AH- (Assembled by

fabricated and assembled at the level of maintenance indicated by the

GS Category)

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

AL- (Assembled by

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

SRA)

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 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 in-

dicate 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.

(b) The maintenance code entered in the fourth position tells whether or not the item is to be repaired

and identifies the lowest maintenance level with the capability to do complete repair (i.e., perform all

authorized repair functions.) (NOTE: Some limited repair may be done on the item at a lower level of

maintenance, if authorized by the Maintenance Allocation Chart (MAC) and SMR codes.) This position will

contain one of the following maintenance codes.

C1 C-3