TM 10-3930-235-24P 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 DS/ individually.  They must be AVUM Level) made from bulk material which MH-(Made at GS is identified by the part number Level) in the DESCRIPTION AND USABLE ON CODE (UOC) ML-(Made at Spa- column and listed in the Bulk cialized 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 UM/AVUM Individually.  The parts that Level) make up the assembled item AF-(Assembled by must be requisitioned or DS/AVIM 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 SRA) 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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