AO- (Assembled by
Items with these codes are not to be requested/requisitioned
individually. The parts that make up the assembled item must be
AF- (Assembled by
requisitioned or fabricated and assembled at the level of
maintenance indicated by the source code. If the 3rd position
AH- (Assembled by
code of the SMR code authorizes you to replace the item, but the
source code indicated the item is assembled at a higher level,
AL- (Assembled by
order the item from the higher level of maintenance.
AD- (Assembled by
Do not requisition an "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 CAGE and part number given.
Installation drawing, diagram, instruction sheet, field service drawing, that is identified by manufacturer's part
Item is not stocked. Order an 'XD"-coded item through normal supply channels using the CAGE 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".
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
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 organizational maintenance.
Organizational can remove, replace, and use the item.
Direct support 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.