TM  5-4120-356-24P MB MD AO AF AH AD XA XB XD Item to be manufactured or fabricated at the  general  support  maintenance  level. Item to be manufactured or fabricated at the  depot  maintenance  level. Item  to  be  assembled  at  organizational level. Item  to  be  assembled  at  direct  support maintenance  level. Item  to  be  assembled  at  general  support maintenance  level. Item   to   be   assembled   at   depot maintenance  level. Item is not procured or stocked because the  requirements  for  the  item  will  result in the replacement of the next higher assembly. Item is not procured or stocked. If not available  through  salvage,  requisition. A  support  item  that  is  not  stocked. When required, item will be procured through  normal  supply  channels. NOTE Cannibalization or salvage maybe 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 C O I 2 Application/Explanation Crew   or   operator   maintenance performed   within   organizational maintenance. Support  item  is  removed,  replaced,  used at the organizational level. Support  item  is  removed,  replaced,  used F H D by  the  direct  support  element  of  in- tegrated  direct  support  maintenance. Support  item  is  removed,  replaced,  used at the direct support level. Support  item  is  removed,  replaced,  used at the general support level. Support   items   that   are   removed, replaced, used at depot, mobile depot, specialized  repair  activity  only. NOTE Codes “I” and “F” will be considered the same by direct support units. (b) The  maintenance  code  entered  in  the fourth  position  indicates  whether  the  item  is  to  be repaired and identifies the lowest maintenance level  with  the  capability  to  perform  complete repair  (i.e.,  all  authorized  maintenance  functions). This  position  will  contain  one  of  the  following maintenance  codes: Code O F H D L Z B Application/Explanation The  lowest  maintenance  level  capable  of complete repair of the support item is the  organizational  level. The  lowest  maintenance  level  capable  of complete repair of the support item is the  direct  support  level. The  lowest  maintenance  level  capable  of complete repair of the support item is the  general  support  level. The  lowest  maintenance  level  capable  of complete repair of the support item is the  depot  level. Repair   restricted   to   designated specialized  repair  activity. Nonreparable.  No  repair  is  authorized. No  repair  is  authorized.  The  item  maybe reconditioned  by  adjusting,  lubricating, etc., at the user level. No parts or special tools  are  procured  for  the  maintenance of this item. (3) Recoverability Code. Recoverability   codes are  assigned  to  support  items  to  indicate  the disposition  action  on  unserviceable  items.  The recoverability  code  is  entered  in  the  fifth  position of  the  Uniform  SMR  Code  format  as  follows: