ARMY TM 9-6115-672-24P
AIR FORCE TO 35C2-3-444-34
MARINE CORPS TM 09244A/09245A-24P/3
AO - (Assembled by unit)
Items with these codes are not to be requested/requisitioned
(Assembled by DS or
individually. The parts that make up the assembled item must be
requisitioned or fabricated and assembled at the category of
AH - (Assembled by GS)
maintenance indicated by the source code. If the 3rd position code of
(Assembled by SRA)
the SMR authorizes you to replace the item, but the source code
AD - (Assembled by Depot)
indicates the item is assembled at a higher category, order the item
from the higher category of maintenance.
Do not requisition an XA-coded item. order its next higher assembly. (Also, refer to the
If an XB item is not available from salvage, order it using the FSCM and part number given.
Installation drawing, diagram, instruction sheet, field service drawing, that is identified by
manufacturer's part number.
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 f or 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 category (s) of maintenance authorized to USE
and REPAIR support items. The maintenance codes are entered in the 3rd and 4th positions of the SMR Code as
(a) The maintenance code entered in the 3rd position tells you the lowest maintenance category
authorized to remove, replace, and use an item. The maintenance code entered in the 3rd position will indicate
authorization to one of the following categories of maintenance.
Crew or operator maintenance done within unit maintenance.
Unit category can remove, replace, and use the item.
Direct support or intermediate category can remove, replace, and use the item.
General support catagory can remove, replace, and use the item.
Specialized repair activity can remove, replace, and use the item.
Depot catagory can remove, replace, and use the item.