(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:
Application/Explanation
Code
C - Crew or operator maintenance done within unit or aviation unit maintenance.
0 - Unit or aviation unit category can remove, replace, and use the item.
F - Intermediate direct support or aviation intermediate level can remove, replace, and use the item.
H - Intermediate 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 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).
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:
Application/Explanation
Code
O - Unit or aviation unit is the lowest level that can do complete repair of the item.
F - Intermediate direct support or aviation intermediate is the lowest level that can do complete repair of the item.
H - Intermediate 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.
B-3
TM 3-4230-209-30&P
