TM 9-6115-668-23P43.2.2. Maintenancecode. Maintenance codes tell you the level(s) of maintenance authorized to USEand REPAIR support items. The maintenance codes are entered in the third and fourth positions of the SMRCode as follows:3.2.2.1. MaintenanceCodeThirdPosition. The maintenance code entered in the third posi-tion tells you the lowest maintenance level authorized to remove, replace, and use an item. Themaintenance code entered in the third position will indicate authorization to one of the followinglevels of maintenance.CodeApplication/ExplanationC –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 level can remove, replace, and use the item.H –General support level maintenance 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.3.2.2.2. MaintenanceCodeFourthPosition. The maintenance code entered in the fourth posi-tion tells whether or not the item is to be repaired and identifies the lowest maintenance level withthe capability to do complete repair (i.e., perform all authorized repair functions.) (NOTE: Somelimited repair may be done on the item at a lower level of maintenance, if authorized by the Mainte-nance Allocation Chart (MAC) and SMR codes.) This position will contain one of the following main-tenance codes.CodeApplication/ExplanationO–Unit is the lowest level that can do complete repair of the item.F–Direct support or aviation intermediate is the lowest level that can do complete repair of theitem.H–General Support is the lowest level that can do complete repair of the item.L–Specialized repair activity (designate the specialized repair activity) is the lowest level thatcan 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 “B”coded item). However, the item may be reconditioned by adjusting, lubricating, etc., at theuser level.
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