TM 9-2350-267-24P3.EXPLANATION OF COLUMNS (SECTIONS II AND Ill) (Con’t).NOTECannibalization or controlled exchange, when authorized, maybe used as a sourceof supply for items with the above source codes, except for those source coded "XA.”XA - DO NOT requisition an “XA” -coded item. Order its next higher assembly.XB - If an “XB” item is not available from salvage, order it using the CAGEC and part number given.XC - Installation drawing, diagram, instruction sheet, field service drawing, that is identified by manufacturers partnumber.XD - Item is not stocked. Order an “XD” -coded item through normal supply channels using the CAGEC and partnumber given, if no NSN is available.(2) Maintenance Code. Maintenance codes tell you the level(s) of maintenance authorized to use andrepair support items. The maintenance codes are entered in the third and fourth positions of the SMRcode 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.CodeCCrew or operator maintenance done within unitmaintenance.maintenance or aviation unitOOrganizational maintenance or aviation unit 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.NOTEIf authorized by the Maintenance Allocation Chart (MAC) and SMR codes,some limited repair may be done on an item at a lower level of maintenance.(b) The maintenance code entered in the fourth position tells whether the item is to be repaired andidentifies the lowest maintenance level with the capability to do complete repair (i.e., perform allauthorized “Repair”functions). This position will contain one of the following maintenance codes:Application/Explanation
Integrated Publishing, Inc. - A (SDVOSB) Service Disabled Veteran Owned Small Business