TM 5-4310-348-24P Code Definition 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. XA Item is NOT procured or stocked because the requirements for the item will result in replacement of the next higher assembly. XB Item NOT procured or stocked.   If   not   available   through   field   service   drawing   that   is   identified   by manufacturer's part number. XD A low mortality item that is not stocked.   When  required,  items  will  be  requested  and  provided  through normal supply channels. NOTE Cannibalization  or  salvage  may  be  used  as  a  source  of  supply  for  any  items  coded  above  except those coded XA and support items restricted by AR 700-42. (2) Maintenance code. The maintenance code entered in the  third  position  indicates  the  lowest  maintenance level authorized to remove, replace, and use the item. 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). When a maintenance code is not used in the fourth position, a dash (-) will be entered. Code Application/Explanation 0 Item is removed, replaced, used (third position), or complete repair (fourth position) at the   organizational level. F Item is removed, replaced, used (third position), or complete repair (fourth position) at the direct   support maintenance level. H Item is removed, replaced, used (third position) or complete repair (fourth position) at the general   support maintenance level. D Item is removed, replaced, used (third position) or complete repair (fourth position) at the depot   maintenance level. L Repair restricted to designated specialized repair activity (fourth position). Z Non-repairable.  No repairs authorized (fourth position). B No repair is authorized.  The item may be reconditioned by adjusting, lubricating, etc., at the user level.   No parts or special tools are procured for maintenance of this item (fourth position). (3)  Recoverability  code.  The  recoverability  code  entered  in  the  fifth  position  indicates  the  disposition action on unserviceable items. Code Application/Explanation Z Non-repairable item.  When unserviceable, condemn and dispose at the level indicated in position   three (3). O Repairable item.  When uneconomically repairable, condemn and dispose at organizational   level. F Repairable item.  When uneconomically repairable, condemn and dispose at direct support level. H Repairable item.  When uneconomically repairable, condemn and dispose at general support    level. D Repairable item.  When beyond lower level repair capability, return to depot.  Condemnation and   disposal not authorized below depot level. L Repairable item.  Repair, condemnation, and disposal not authorized below depot/specialized   repair activity level. A Item requires special handling or condemnation procedures because of specific reasons (i.e., precious   metal content, high dollar value, critical material, or hazardous material). b.  Federal  Stock  Number.    Indicates  the  Federal  stock  number  assigned  to  the  item  and  will  be  used  for requisitioning purposes. c. Description.  Indicates the Federal item name and a minimum description required to identify the item. The last line indicates the reference number followed by the applicable Federal Supply Code for Manufacturer (FSCM) in parentheses.  The FSCM is used as an element in item identification to designate manufacturer of distributor or Government agency, etc., and is identified in SB 708-42.  Items that are included in-kits and sets are listed below the name of the kit or set with quantity of each item in the kit or set indicated in front of the item name. d.  Unit  of  'Measure  (U/M).  Indicates  the  standard  or  basic  quantity  by  which  the  listed  item  is  used  in performing   the   actual   maintenance   function.   This   measure   is   expressed   by   a   two-character   alphabetical abbreviation,  e.g.,  ea,  in,  etc.,  and  is  the  basis  used  to  indicate  quantities  and  allowances  in  subsequent columns. e.  Quantity  Incorporated  in  Unit.  Indicates  the  quantity  of  the  item  used  in  the  breakout  shown  on  the illustration figure, which is prepared for an assembly group or an assembly. A "V" appearing in this column in lieu of a quantity indicates that no specific quantity is applicable,. e.g., shims, spacers, etc. f:  Fifteen-Day  Organizational  Maintenance  Allowances.    Items  authorized  for  u-se  as  required  but  not  for initial stockage are identified with an asterisk in the allowance column. g.  Thirty-Day  DS/GS  Maintenance  Allowance.    Items  authorized  for  use  as  required  but  not  for  initial stockage are identified with an asterisk in the allowance column. iv