TM 10-3930-609-24P Code Application/Explanation PA Stocked items; use the applicable NSN to PB request/requisition   items  with  these PC* * source codes.  They are authorized to the PD category indicated by the code entered in PE the 3d position of the SMR code. PF .**  Items  coded  PC  are  subject  to PG deterioration. Items with these codes are not to be re- KD quisitioned individually.  They are part of a KF kit which is authorized to the maintenance KB category indicated in the 3d position of the SMR code. The complete kit must be requisitioned and applied. MO-(Made at UM/ Items with these codes are not AVUM Level) to be requested/requisitioned MF-(Made at DSI individually.   They  must  be AVUM Level) made from bulk material which MH-(Made at GS is identified by the part number in  the DESCRIPTION AND Level USABLEON  CODE (UOC) ML-(Made at Spe- column and listed in the Bulk cialzed Repair Material group of the repair Activity parts list in this RPSTL.  If the (SRA)) item is authorized to you by the MD-(Made at 3d position code of the SMR Depot) code,  but the source code indicates it is made at a higher level, order the item from the higher level of maintenance. Items with these codes are not AO-(Assembled by to be requested/requisitioned UMI AVUM individually.   The  parts  that Level) make up the assembled item AF-(Assembled by must   be   requisitioned   or DSIAVIM fabricated and assembled at Level) the  level  of  maintenance AH-(Assembled by indicted by the source code.  If GS Category) the 3d position code of the SMR code authorizes you to AL-(Assembled by replace  the  item,  but  the SPA) source code indicates the item AD-(Assembled by is assembled at a higher level, Depot) 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 following.) XB - If an "XB"  item is not available from salvage, order it using the CAGE 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 CAGE and part number given, if no NSN is available. NOTE: Cannibalization or controlled exchange, when authorized, may be 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 700-42. (2)  Maintenance  Code.    Maintenance  codes  tell  you  the level(s)    of    maintenance    authorized    to    USE    and    REPAIR support  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 the following levels of maintenance. Code Application/Explanation C - 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 identifies the 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 Allocation  Chart   (MAC)   and   SMR   codes.)   This   position   will contain one of the following maintenance codes: Code Application/Explanation O - Unit maintenance or aviation unit is the lowest level that can do complete repair of the item. 2

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