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TM 10-4320-351-24P
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 750-1.
(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.
Maintenance
Application/Explanation
Code
C
Crew or operator maintenance done within unit/AVUM maintenance.
O
Unit level/AVUM maintenance can remove, replace and use the item.
F
Direct support/AVIM maintenance can remove, replace and use the item.
H
General support maintenance can remove, replace and use the item.
L
Specialized repair activity can remove, replace and use the item.
D
Depot 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 and SMR code.
Maintenance
Application/Explanation
Code
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.
H
General support 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. 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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