ARMY TM 9-6115-584-24P NAVY NAVFAC P-8-622-24P AIR FORCE T.O.  35C2-3-456-4 Maintenance Application/Explanation Code C - Crew or operator maintenance done within unit/AVUM maintenance. O - Unit level/AVUM maintenance can remove, replace, and use the item. F - Direct support/AVIM maintenance can remove, replace, and use the item. H - General support maintenance can remove, replace, and use the item. L - Specialized repair activity can remove, replace, and use the item. D - Depot 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   an   item   at   a   lower   level   of   maintenance,   if authorized by the Maintenance Allocation Chart and SMR codes. Maintenance Application/Explanation Code O - Unit/AVUM is the lowest level that can do complete repair of the item. F - Direct support/AVIM is the lowest level that can do complete repair of the item. H - General Support is the lowest level that can do complete repair of the item. L - Specialized repair activity is the lowest level that can do complete repair of the item. D - Depot is the lowest level that can do complete repair of the item. Z - Nonreparable.  No repair is authorized. B - No repair is authorized.  No parts or special tools are authorized for the maintenance of a "B" coded item.   However, the item may be reconditioned by adjusting, lubricating, etc., at the user level. (3) Recoverability   Code.      Recoverability   codes   are   assigned   to   items   to   indicate   the   disposition   action   on unserviceable items.  The recoverability code is entered in the fifth position of the SMR Code as follows: Recoverability Application/Explanation Codes Z - Nonreparable item. When  unserviceable,  condemn  and  dispose  of  the  item  at  the  level  of  maintenance shown in 3d position of SMR Code. O - Reparable  item.    When  not  economically  reparable,  condemn  and  dispose  of  the  item  at  unit  or  AVUM level. F - Reparable item.  When uneconomically reparable, condemn and dispose of the item at the direct support or AVIM level. H - Reparable item.  When uneconomically reparable, condemn and dispose of the item at the general support level. D - Reparable item.  When beyond lower level repair capability, return to depot.  Condemnation and disposal of item not authorized below depot level. L - Reparable item.  Condemnation and disposal not authorized below specialized repair activity (SRA). A - Item  requires  special  handling  or  condemnation  procedures  because  of  specific  reasons  (e.g.,  precious metal   content,   high   dollar   value,   critical   material,   or   hazardous   material).      Refer   to   appropriate manuals/directives for specific instructions. 3