TM 1-4920-500-13&P
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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 items
source coded "XA" or those aircraft support items restricted by requirements of
AR 750-1.
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 the following levels of maintenance:
Maintenance
Code
Application/Explanation
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.
G
Afloat and ashore intermediate maintenance can remove, replace, and use the item (Navy
only).
K
Contractor facility can remove, replace, and use the item.
Z
Item is not authorized to be removed, replaced, or used at any maintenance level.
D
Depot can remove, replace, and use the item.
*NOTE Army may use C in the third position. However, for joint service publications, Army will use O.
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
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.
H
General Support is the lowest level that can do complete repair of the item.
L
Specialized repair activity XXXX 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.
G
Both afloat and ashore intermediate levels are capable of complete repair of item. (Navy only)
K
Complete repair is done at contractor facility.
Z
Non-reparable. No repair is authorized.
B
No repair is authorized. No parts or special tools are authorized for maintenance of "B" coded
item. However, the item may be reconditioned by adjusting, lubricating, etc., at the user level.
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