TM 10-4930-236-13&PNOTECannibalization or controlled exchange, when authorized, may be used asa source of supply for items with the above source codes, except for thosesource coded "XA" or those aircraft support items restricted byrequirements of AR 750-1.(2) Maintenance Code. Maintenance codes tells 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 authorized toremove, replace, and use an item. The maintenance code entered in the third position will indicateauthorization to one of the following levels of maintenance.CodeApplication/ExplanationC-Crew or operator maintenance done within organizational or aviation unit maintenance.O-Organizational or aviation unit category can remove, replace, and use the item.F-Direct support or aviation intermediate level can remove, replace, and use the item.H-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 whether or not the item is to be repaired andidentifies 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/ExplanationO-Organizational or aviation 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 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 Codeditem). However, the item may be reconditioned by adjusting, lubricating, etc., at the user level.(3)Recoverability Code. Recoverability codes are assigned to items to indicate thedisposition action on unserviceable items. The recoverability code is entered in the fifth position of theSMR Code as follows:Change 1F-3
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