TM 10-4320-346-12&PNOTECannibalization or controlled exchange, when authorized, may be used as a sourceof 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) MaintenanceCode.Maintenance codes tell you the level(s) of maintenance authorized to USE andREPAIR support items. The maintenance codes are entered in the third and fourth positions of theSMR code as follows:(a) The maintenance code entered in the third position tells you the lowest maintenance levelauthorized to remove, replace, and use an item. The maintenance code entered in the thirdposition will indicate authorization to the following levels of maintenance.MaintenanceCodeApplication/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 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 berepaired and identifies the lowest maintenance level with the capability to do complete repair (i.e.,per- form all authorized repair functions.)NOTESome limited repair may be done on an item at a lower level of maintenance, ifauthorized by the Maintenance Allocation Chart and SMR codes.MaintenanceCodeApplication/ExplanationO - 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" codeditem. However, the item may be reconditioned by adjusting, lubricating, etc., at the user level.(3)RecoverabilityCode.Recoverability codes are assigned to items to indicate the disposition action onunserviceable items. The recoverability code is entered in the fifth position of the SMR Code asfollows:C-3
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