TM 9-2350-256-24P- 1 C01
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 3rd
position of the SMR code authorizes you to replace the item, but the source
indicates the item is assembled at a higher level, order the item from the higher level
Do not requisition an "XA" coded item Order its next higher assembly (Also, refer to the NOTE
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
manufacturers 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.
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.
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:
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.
Crew or operator maintenance done within unit or aviation unit
Unit 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.
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.
(Assembled by GS