TM 55-1730-226-23P
(2) Maintenance Code. Maintenance codes tells 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 in-
dicate authorization to one of the following levels of maintenance.
C o d
e
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.
C o d
e
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.
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