TM 5-6350-264-14&P-10NAVELEX EE 181-AA-OMI-110/E121 C-9412T.O. 31S9-2FSS9-1-10Code ExplanationXA-Do not requisition an "XA" -coded item. Order its next higher assembly. (Also, refer to the NOTE below.)XB-If an "XB" item is not available from salvage, order it using the FSCM and part number given.XC-Installation drawing, diagram, instruction sheet, field service drawing, that is identified by manufacturer’s part number.XD-Item is not stocked. Order an "XD" -coded item through normal supply channels using the FSCM and part numbergiven, if no NSN is available.NOTECannibalization or controlled exchange, when authorized, may be used as a source ofsupply for items with the above source codes, except for those source coded "XA" orthose aircraft support items restricted by requirements of AR 700-42.(2)Maintenance Code.Maintenance codes tells 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 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 repairedand identifies the lowest maintenance level with the capability to do complete repair (i.e., performall authorized repair functions.) NOTE: Some limited repair may be done on the item at a lowerlevel of maintenance, if authorized by the Maintenance 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 theitem.Change 1 C-3
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