TM 10-3510-208-20P Code Definition PG Item  procured  and  stocked  to  provide for  sustained  support  for  the  life  of  the equipment.      It   is   applied   to   an   item peculiar to the equipment which, because  of  probable  discontinuance  or shutdown  of  production  facilities,  would prove  uneconomical  to  reproduce  at  a later time. KD An  item  of  a  depot  overhaul/repair  kit and not purchased separately.  Depot kit defined   as   a   kit   that   provides   items required   at   the   time   of   overhaul   or repair. KF An  item  of  a  maintenance  kit  and  not purchased  separately.    Maintenance  kit defined  as  a  kit  that  provides  an  item that can be replaced at organizational or intermediate levels of maintenance. KB Item included in both a depot overhaul/ repair kit and a maintenance kit. MO Item to be manufactured or fabricated at organizational level. MF Item to be manufactured or fabricated at the direct support maintenance level. MH Item to be manufactured or fabricated at the general support maintenance level. MD Item to be manufactured or fabricated at the depot maintenance level. AO Item  to  be  assembled  at  organizational level. AF Item  to  be  assembled  at  direct  support maintenance level. AH Item to be assembled at general support maintenance level. AD Item to be assembled at depot maintenance level. Code Definition XA Item is not procured or stocked because the requirements for the item will result in  the  replacement  of  the  next  higher assembly. XB Item  is  not  procured  or  stocked.    If  not available through salvage, requisition. XD A   support   item   that   is   not   stocked. When  required,  item  will  be  procured through normal supply channels. NOTE Cannibalization   or   salvage   may   be used  as  a  source  of  supply  for  any items    source    coded    above    except those coded XA or XD. (2) Maintenance    Code.        Maintenance codes are assigned to indicate the levels of maintenance authorized to use and repair support items. The  maintenance  codes  are  entered  in  the  third  and fourth  positions  of  the  Uniform  SMR  Code  format  as follows: (a) The  maintenance  code  entered in the third position will indicate the lowest maintenance level authorized to remove, replace, and use the support item.      The   maintenance   code   entered   in   the   third position   will   indicate   one   of   the   following   levels   of maintenance. Code Application/Explanation C Crew or operator maintenance performed within organizational maintenance. O Support    item    is    removed,    replaced, used at the organizational level. NOTE Codes  "Z"  and  "F"  will  be  considered the same by direct support units. 1-2