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TM 1-2840-238-23P
NOTE:
Cannibalization or controlled exchange, when authorized, may be used as a
source of supply for items with the above source codes, except for those source
coded "XA" or those aircraft support items restricted by requirements of
AR 700-41.
(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 fol-
lows:
(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
O-
Unit level/Aviation unit (AVUM) level can remove, replace, and use the item.
F-
Direct Support/Aviation intermediate (AVIM) 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 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). This position will contain one of the following maintenance codes.
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.
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.
L-
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. However, the item may be reconditioned by adjusting, lubricating,
etc., at the user level. No parts or special tools are authorized for the maintenance of a "B"
coded item.
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