TM 10-4320-344-24P-3CodeExplanationItems with these codes are not to berequested/requisitioned individually.They must be made from bulk materialMO-(Made at Unit/AVUM Level)which is Identified by the part numberMF-(Made at DS/AVIM Level)in the DESCRIPTION AND USABLE ON CODEMH-(Made at GS Level) >(UOC) column and listed in the BulkML-(Made at Specialized RepairMaterial group of the repair parts listAct (SRA))in this RPSTL. If the item isMD-(Made at Depot)authorized to you by the 3d positioncode of the SMR code, but the sourcecode indicates it is made at a higherlevel, order the item from the higherlevel of maintenance.Items with these codes are not to berequested/requisitioned individually.The parts that make up the assembledAO-(Assembled by Unit/AVUM Level)item must be requisitioned orAF-(Assembled by DS/AVIM Level)fabricated and assembled at the levelAH-(Assembled by GS Category) >of maintenance indicated by the sourceAL-(Assembled by SRA)code. If the 3d position code of theAD-(Assembled by Depot)SMR code authorizes you to replace theitem, but the source code indicates theitem is assembled at a higher level,order the item from the higher level ofmaintenance.XA - 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 FSCMand part number given.XC - Installation drawing, diagram, instruction sheet, field servicedrawing, that is identified by manufacturer's part number.XD - Item is not stocked. Order an "XD"-coded item through normal supplychannels using the FSCM and part number given, if no NSN is available.NOTECannibalization or controlled exchange, when authorized, may be used as a source of supply for items with theabove source codes, except for those source coded *XA" or those aircraft support items restricted by requirementsof AR 700-42.3.2.2. MaintenanceCode. 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:3.2.2.1. MaintenanceCodeThirdPosition. The maintenance code entered in the third position tells you the lowestmaintenance level authorized to remove, replace, and use an item. The maintenance code entered in the third positionwill indicate authorization to one of the following levels of maintenance.CodeApplication/ExplanationC-Crew or operator maintenance done within unitor aviation unit maintenance.O-Unit or aviation unit category can remove,replace, and use the item.3
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