TM  10-3930-243-34P Code PA PB PC** PD PE PF PG KD KF KB Application/Explanation Stocked  items;  use  the  applicable  NSN  to request/requisition   items   with   these source  codes.  They  are  authorized  to  the category  indicated  by  the  code  entered  in the  3d  position  of  the  SMR  code. *    *    Items    coded    PC    are    subject    to deterioration. Items  with  these  codes  are  not  to  be  re- quisitioned  individually.  They  are  part  of  a kit which is authorized to the maintenance category indicated in the 3d position of the SMR   code.   The   complete   kit   must   be requisitioned  and  applied. MO-(Made   at   UMI AVUM Level) MF-(Made  at  DSI AVUM Level) MH-(Made  at  GS Level) ML-(Made  at  Spe- cialized  Repair Activity (SRA)) MD-(Made   at Depot) Code AO-(Assembled  by UMI  AVUM Level) AF-  (Assembled  by DS/AVIM Level) AH-  (Assembled  by GS  Category) AL-(Assembled  by SRA) AD-  (Assembled  by Depot) Items with these codes are not to  be  requested/requisitioned individually,   They   must   be made  from  bulk  material  which is identified by the part number in   the   DESCRIPTION   AND USABLE   ON   CODE   (UOC) column  and  listed  in  the  Bulk Material   group   of   the   repair parts  list  in  this  RPSTL.  If  the item is authorized to you by the 3d   position   code   of   the   SMR 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 to  be  requested/requisitioned individually.   The   parts   that make   up   the   assembled   item must   be   requisitioned   or fabricated   and   assembled   at the level   of maintenance indicted  by  the  source  code,  If the   3d   position   code   of   the SMR   code   authorizes   you   to replace   the   item, but   the source  code  indicates  the  item is assembled at a 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  following.) XB - If   an   “XB”   item   is   not   available   from salvage, order it using the CAGE and part number  given. XC - XD - Installation   drawing,   diagram,   instruction sheet, field   service   drawing,   that   is identified   by   the   manufacturer’s   part number. I t e m    i s    n o t    s t o c k e d    o r d e r    a n “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. 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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