TM 9-2330-388-24P 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 UMI 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 USABLE ON CODE (UOC) ML-(Made at Spe- column and listed in the Bulk clalized 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 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 "X’"-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