TM 3-1040-281-20&P
(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
o n e of following levels of maintenance:
Application/Explanation
Code
C - Crew or operator maintenance done within unit or aviation unit maintenance.
O - Unit or aviation unit !evel can remove, replace, and use the item.
F - Intermediate direct support or aviation intermediate level can remove, replace, and use the item.
H - Intermediate general support level can remove, replace, and use the item.
L - Specialized repair activity can remove, replace, and use the item.
D-
Depot level can remove, rep!ace and use the item.
(b) The maintenance code entered in the fourth position tells you 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 maybe 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
Code
Application/Explanation
O - Unit or aviation unit is the lowest level that can do complete repair of the item.
F - Intermediate direct support or aviation intermediate is the lowest level that can do complete repair of the
item.
H - Intermediate general support is the lowest level that can do complete repair of the item.
L - Specialized repair activity (designate the specialized repair activity) is the lowest level that can do complete
repair of the item.
D - Depot is the lowest level that can do complete repair of the item.
Z - Nonreparable. No repair is authorized.
B - No repair is authorized. No parts or special tools are authorized for the maintenance of a "B" coded item.
However, the item may be reconditioned by adjusting, lubricating, etc., at the user level.
C-3
