TM-9-2350-277-24P Parts Manual M113A3 M577A3 M1064A3 M1068A3 M58 Download
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SECTION I TM 9-2350-277-24P 4 (2) Maintenance Code. Maintenance codes tell you the level(s) of maintenance authorized to USE and REPAIR support 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 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: Code Application/Explanation C Crew or operator maintenance done within unit maintenance. O Unit maintenance level can remove, replace, and use the item. F Direct support 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 and identifies the lowest maintenance level with the capability to do complete repair (i.e., perform all authorized repair function). (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: Code Application/Explanation O Unit maintenance is the lowest level that can do complete repair of the item. F Direct support 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 (SRA) 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.