Maintenance Code - TM-5-4120-369-24P

3 TM 5-4120-369-24P AO – – (Assembled by erg/AVUM Level) AF -- (Assembled by DS/AVIM Level AH - – (Assembled by GS Category) AL – – (Assembled by SRA) AD – – (Assembled by Depot) Explanation items with these codes are not to be requested/recluisi- tioned individually. The parts that makeup the assembled item must be requisitioned or fabricated and assembled at the level of maintenance indicated by the source code. If the 3d position code of the SMF code authorizes you to replace the item, but the source code indicates the items are assembled at a higher level, order the item from the higher level of maintenance. Code Explanation XA – – Do not requisition “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 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 avai able. NOTE Cannibalization or controlled exchange, when authorized, maybe used as a source of supply for items with the above source codes, except for those source coded “XA” or those aircraft support items restricted by requirements of AR 750-1. (2) Maintenance Code. Maintenance codes tells you the levels) of mainte- nance authorized to USE and REPAIR support items. The maintenance codes are entered in the third and fourth positions of the SMR code as fol- Iows: (a) The maintenance code entered in the third position tells you the low- est maintenance level authorized to remove, replace, and use an item. The maintenance code entered in the third position will indicate authorization to one of the following Ievels of maintenance. Code Application/Explanation C -Crew or operator maintenance done within organizational or aviation unit maintenance. O -Organizational or aviation unit category can remove, replace, and use the item.