TM 10-1670-262-12&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 one of the following levels of maintenance.
CODE
Application/Explanation
C
-Crew or operator maintenance done within organizational or aviation unit
maintenance.
O
-Organizational or aviation unit category can remove, replace, and use the
item.
F
-Direct support or aviation intermediate level can remove, replace, and use
the item.
H
-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, 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). (NOTE: some limited repair may be 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
-Organizational or aviation unit is the lowest level that can do complete
repair of the item.
F
-Direct support or aviation intermediate 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.
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
