SECTION ITM 5-3810-294-34P(1) Source Code. The source code tells you how to get an item needed for maintenance, repair, or overhaul of anend item/equipment. Explanations of source codes follows:CodeApplication/ExplanationPAStocked items; use the applicable NSN to request/requisition items with these source codes. They arePBauthorized to the category indicated by the code entered in the 3d position of the SMR code.PC**PD**Items coded PC are subject to deterioration.PEPFPGKDItems with these codes are not to be requested/requisitioned individually. They are part of a kit which isKFauthorized to the maintenance category indicated in the 3d position of the SMR code. The complete kitKBmust be requisitioned and applied.MO-(Made at UM/AVUM Level)Items with these codes are not to be requested/requisitionedMF-(Made at IDS/AVUM Level)individually. They must be made from bulk material which is identified byMH-(Made at IGS Level)the part number in the DESCRIPTION AND USABLE ON CODE (UOC)ML-(Made at Specialized Repair Act (SRA))column and listed in the Bulk Material group of the repair parts list in thisMD-(Made at DepotRPSTL. If the item is authorized to you by the 3d position code of the SMRcode, but the source code indicates it is made at a higher level, order theitem from the higher level of maintenance.AO-,/Assembled by UM/AVUM Level)Items with these codes are not to be requested/requisitioned individually.AF-(Assembled by IDS/AVIM Level)The parts that make up the assembled item must be requisitioned orAH-(Assembled by IGS Category)fabricated and assembled at the level of maintenance indicated by theAL-(Assembled by SRA)source code. If the 3d position code of the SMR code authorizes you toAD-(Assembled by Depot)replace the item, but the source code indicates the item is assembled ata higher level, order the item from the higher level of maintenance.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 FSCM and part number given.XC-Installation drawing, diagram, instruction sheet, field service drawing, that is identified by the manufacturer’s part number.XD-Item is not stocked. Order an "XD"-coded item through normal supply channels using the FSCM and part number given, if no NSN is available.NOTE: Cannibalization or controlled exchange, when authorized, may be used as source of supply for items with theabove source codes, except for those source coded "XAW or those aircraft support items restricted by requirements of AR700-42.(2) Maintenance Code. Maintenance codes tell 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 to remove,replace, and use an item. The maintenance code entered in the third position will indicate authorization to one of thefollowing levels of maintenance.CodeApplication/ExplanationC -Crew or operator maintenance done within unit maintenance or aviation unit maintenance.O -Unit maintenance 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 repaired and identifiesthe lowest maintenance level with the capability to do complete repair (i.e., perform all authorized repair functions.) (NOTE:Some limited repair may be done on the item at a lower level of maintenance, if authorized by the Maintenance AllocationChart (MAC) and SMR codes.) This position will contain one of the following maintenance codes:2
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