TM 9-2330-390-14&PC-3.EXPLANATION OF COLUMNS (SECTIONS II AND III) (Con’t).CodeApplication/ExplanationXC . . . . . . . . . . . . installation drawing, diagram, instruction sheet, or field service drawingthat is identified by manufacturer’s part number.XD . . . . . . . . . . . . . Item is not stocked. Order an “XD”-coded item through normal supplychannels using the CAGE and part number given, if no NSN is available.(2)Maintenance Code. Maintenance codes tell you the level(s) of maintenance authorized to useand repair support items. The maintenance codes are entered in the third and fourth positions of the SMR code asfoiiows:(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. . . . . . . . . . . . . . Operator or Crew Maintenance done within Unit Maintenance or aviationunit maintenance.O . . . . . . . . . . . . . .Unit Maintenance or aviation unit maintenance can remove, replace, anduse the item.F . . . . . . . . . . . . . . .Direct Support Maintenance or aviation intermediate maintenance canremove, replace, and use the item.H . . . . . . . . . . . . . .General Support Maintenance can remove, replace, and use the item.L . . . . . . . . . . . . . . .Specialized Repair Activity (SRA) can remove, replace, and use the Item.D. . . . . . . . . . . . . .Depot Maintenance can remove, replace, and use the item.NOTESome limited repair may be done on the item at a lower level of maintenance, Ifauthorized by the Maintenance Allocation Chart (MAC) and SMR codes.(b)The maintenance code entered In the fourth position tells whether or not the item is to berepaired and identifies the lowest maintenance level with the capability to do complete repair(i.e., perform all authorized “Repair” functions). me maintenance code entered in the fourthposition will indicate authorization to one of the following levels of maintenance.CodeApplication/ExplanationO . . . . . . . . . . . . . . Unit Maintenance or aviation unit maintenance is the lowest level that cando complete repair of the item.F . . . . . . . . . . . . . . .Direct Support Maintenance or aviation intermediate maintenance is thelowest level than can do complete repair of the item.H . . . . . . . . . . . . . . General Support Maintenance is the lowest level that can do completerepair of the item.C-3
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