TM 10-8415-210-13&PNOTECannibalization or controlled exchange, when authorized, may be used as a source of supplyfor items with the above source codes, except for those source coded "XA" or those aircraftsupport items restricted by requirements of AR 700-42.(2)Maintenance Code. Maintenance codes tell you the level(s) of maintenance authorized to use and repairsupport items. The maintenance codes are entered in the third and fourth positions of the SMR Code as follows:(a)The maintenance code entered in the third position tells you the lowest maintenance level authorizedto remove, replace, and use the support item. The maintenance code entered in the third position will indicateauthorization to one of the following levels of maintenance.CodeApplication/ExplanationCCrew or operator maintenance done within organizational or aviation unit maintenance.OOrganizational or aviation unit category can remove, replace, and use the item.FDirect support or aviation intermediate level can remove, replace, and use the item.HGeneral support level can remove, replace, and use the item.LSpecialized repair activity can remove, replace, and use the item.DDepot level can remove, replace, and use the item.(b)The maintenance code entered in the fourth position tells whether or not the item is to be repairedand identifies the lowest maintenance level with the capability to do complete repair (i.e., perform all authorized repairfunctions.) (NOTE: Some limited repair may be done on the item at a lower level of maintenance, if authorized by theMaintenance Allocation Chart (MAC) and SMR codes.) This position will contain one of the following maintenance codes.CodeApplication/ExplanationOOrganizational or aviation unit is the lowest level that can do complete repair of the item.FDirect support or aviation intermediate is the lowest level that can do complete repair of the item.HGeneral support is the lowest level that can do complete repair of the item.LSpecialized repair activity (designate the specialized repair activity) is the lowest level that can docomplete repair of the item.DDepot is the lowest level that can do complete repair of the item.ZNonrepairable.No repair is authorized.BNo 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.C-3
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