TM 1-2840-254-23P
(2) 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:
(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 indicate authorization to the
following levels of maintenance.
Maintenance
Code
Application/Explanation
C - Crew or operator maintenance done within unit/AVUM maintenance.
O - Unit level/AVUM maintenance can remove, replace, and use the item.
F - Direct support/AVIM maintenance can remove, replace, and use the item.
H - General support maintenance can remove, replace, and use the item.
L - Specialized repair activity can remove, replace, and use the item.
D - Depot 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). This position will contain one of the following maintenance codes.
NOTE
Some limited repair may be done on an item at a lower level of maintenance, if authorized
by the Maintenance Allocation Chart (MAC) and SMR codes.
Maintenance
Code
Application/Explanation
O - Unit/AVUM is the lowest level that can do complete repair of the item.
F - Direct support/AVIM is the lowest level that can do complete repair of the item.
H - General Support is the lowest level that can do complete repair of the item.
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