TM 5-4120-341-23P KF KB MO MF MH MD AO AF AH AD XA XB XC XD 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. Item   included   in   both   a   depot overhaul/repair  kit  and  a  maintenance kit. Item to be manufactured or fabricated at the organizational level. Item to be manufactured or fabricated at the direct support maintenance level. 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   the   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. Installation drawing, diagram, instruction  sheet,  field  service  drawing, that is identified by manufacturer’s part number. 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 coded above except those coded XA and aircraft support items as restricted by AR 700-42. (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: 2 (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 mainte- nance. O Support item is removed, replaced, used at  the  organizational  level. F Support item is removed, replaced, used at the direct support level. H Support item is removed, replaced, used at  the  general  support  level. D Support items that are removed, replac- ed,   used   at   depot,   mobil   depot,   or specialized repair activity only. (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.