TM 10-4930-351-24P
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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:
Third Position. 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
Code
Application/Explanation
Crew or operator maintenance done within unit/AVUM maintenance.
C
Unit level/AVUM maintenance can remove, replace and use the item.
O
Direct support/AVIM maintenance can remove, replace and use the item.
F
General support maintenance can remove, replace and use the item.
H
Specialized repair activity can remove, replace and use the item.
L
Depot can remove, replace and use the item.
D
Fourth Position. 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 (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.
Maintenance
Application/Explanation
Code
Unit/AVUM is the lowest level that can do complete repair of the item.
O
Direct support/AVIM is the lowest level that can do complete repair of the item.
F
General support is the lowest level that can do complete repair of the item.
H
Specialized repair activity is the lowest level that can do complete repair of the item.
L
Depot is the lowest level that can do complete repair of the item.
D
Nonreparable. No repair is authorized.
Z
No repair is authorized. No parts or special tools are authorized for the maintenance of a "B" coded item.
B
However, the item may be reconditioned by adjusting, lubricating, etc., at the user level.
Recoverability Code. Recoverability codes are assigned to items to indicate the disposition action on unserviceable items.
The recoverability code is shown in the fifth position of SMR code as follows:
Recoverability
Application/Explanation
Code
Nonreparable item. When unserviceable, condemn and dispose of the item at the level of maintenance
Z
shown in the third position of the SMR code.
Reparable item. When uneconomically reparable, condemn and dispose of the item at the unit level.
O
Reparable item. When uneconomically reparable, condemn and dispose of the item at the direct support
F
level.
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