Items with these codes are not to be
AO Assembled by
requested/requisitioned individually. The parts that
make up the assembled item must be requisitioned or
AF Assembled by
fabricated and assembled at the level of maintenance
indicated by the source code. If the 3rd position of the
AH Assembled by GS level
SMR code authorizes you to replace the item, but the
AL Assembled by SRA
source code indicates the item is assembled at a higher
AD Assembled by Depot
level, order the item from the higher level of
AG Navy only
Do not requisition an "XA" coded item. Order the next
higher assembly. (Refer to the following NOTE.)
If an item is not available from salvage, order it using the
CAGEC and part number.
Installation drawings, diagrams, instruction sheets, field
Service drawings: identified by manufacturer's 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 items
source coded "XA" or those aircraft support items restricted by requirements
of AR 750-1.
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:
Third Position. 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 the
following levels of maintenance:
Unit level/AVUM maintenance can remove, replace and use the item.
Direct support/AVIM maintenance can remove, replace and use the item.
General support maintenance can remove, replace and use the item.
Specialized repair activity can remove, replace and use the item.
Afloat and ashore intermediate maintenance can remove, replace and use the
item (Navy only).
Contractor facility can remove, replace and use the item.
Item is not authorized to be removed, replaced or used at any maintenance level.
Depot can remove, replace and use the item.
*NOTE Army may use C in the third position. However, for joint service publications, Army will use O.