TM 5-5430-211-13 & PAO-(Assembled byUnit/AVUM Level)AF-(Assembled byDS/AVIM Level)AH-(Assembled byGS Category)AL-(Assembled bySRA)AD-(Assembled byDepot)}ExplanationItems with these codes are not to be requested/requisitioned individually. The partsthat make up the assembled item must be requisitioned or fabricated andassembled at the level of maintenance indicated by the source code. If the 3dposition code of the SMR code authorizes you to replace the item, but the sourcecode indicates the items are assembled at a higher level, order the item from thehigher level of maintenance.CodeExplanationXA-- 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 partnumber.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 of supply for itemswith the above source codes, except for those source coded "XA" or those aircraft support items restrictedby requirements of AR 700-42.(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.C-3
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