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: 0064 00-4  0064 00 TM 10-1670-287-23&P MAINTENANCE CODE - Continued  APPLICATION/ EXPLANATION - Continued  H -  General support is the lowest level that can do  complete repair of the item.  L -  Specialized repair activity (designate the  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 - Non-repairable. 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.  RECOVERABILITY CODE  APPLICATION/EXPLANATION  Z -  Non-repairable item. When unserviceable,  condemn and dispose of the item at the level of  maintenance shown in the 3 $^{rd}$ position of the  SMR Code.  O -  Repairable item. When uneconomically  reparable, condemn and dispose of the item at  organizational or aviation unit level.  F -  Repairable item. When uneconomically  repairable, condemn and dispose of the item at  the direct support or aviation intermediate level.  H -  Repairable item. When uneconomically  repairable, condemn and dispose of the item at  the general support level.  D -  Repairable item. When beyond the lower level  repair capability, return to depot. Condemnation  and disposal of item not authorized below depot  level.