TM 1-1670-260-12&P
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b. 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.
(1) The maintenance code entered in the third position (defined in Table 2) 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 a maintenance level.
Table 2. Third Position Maintenance Code Definitions
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.
(2) The maintenance code entered in the fourth position (defined in Table 3) 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.
Table 3. Fourth Position Maintenance Code Definitions
Maintenance
Code
Application/Explanation
O
Organizational or aviation unit is the lowest level that can do complete repair of the item.
F
Direct support or 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.
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
Non-repairable. 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.
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