TM 10-5410-221-34P-1 (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 maintenance. O      Support   item   is   removed,   replaced,   used   at   the organizational level. I  Support item is removed, replaced, used by the direct support    element    of    integrated    direct    support maintenance. 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,  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 Application/Explanation O    The  lowest  maintenance  level  capable  of  complete repair   of   the   support   item   is   the   organizational level. F    The  lowest  maintenance  level  capable  of  complete repair  of  the  support  item  is  the  direct  support level. H    The  lowest  maintenance  level  capable  of  complete repair  of  the  support  item  is  the  general  support level. D    The  lowest  maintenance  level  capable  of  complete repair of the support item is the depot level. L      Repair   restricted   to   designated   specialized   repair activity. Z  Nonreparable.  No repair is authorized. 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 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: Recoverability Codes Definition Z    Nonreparable  item.    When  unserviceable,  condemn and dispose at the level indicated in position 3. O    Reparable  item.    When  uneconomically  reparable, condemn and dispose at organizational level. F    Reparable  item.    When  uneconomically  reparable, condemn and dispose at the direct support level. H    Reparable  item.    When  uneconomically  reparable, condemn and dispose at the general support level. D    Reparable  item.    When  beyond  lower  level  repair capability,   return   to   depot.      Condemnation   and disposal not authorized below depot level. L  Reparable 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). Refer to appropriate manuals/directives for specific instructions. c.  National Stock Number.  Indicates the National stock number assigned to the item and will be used for requisitioning purposes. d.    Part  Number.    Indicates  the  primary  number used by the manufacturer which controls the design and characteristics  of  the  item  by  means  of  its  engineering drawings,     specifications     standards,     and     inspection requirements to identify an item or range of items. NOTE When    a    stock    numbered    item    is requisitioned, the repair part received   may   have   a   different   part number than the part being replaced. e.          Federal     Supply     Code     for     Manufacturer (FSCM).  The FSCM is a 5-digit numeric code listed in SB  708-42  which  is  used  to  identify  the  manufacturer, distributor, or Government agency, etc. f.    Description.    Indicates  the  Federal  item  name and, if required, and minimum description to identify the item.  Items that are included in kits and sets are listed below the name of the kit or set with the quantity of each item    in    the    kit    or    set    indicated    in    the    quantity incorporated in unit column.  When the part to be used differs  between  serial  numbers  of  the  same  model,  the effective serial numbers are shown as the last line of the description.  In the Special Tools List, the initial basis of issue (BOI) appears as the last line in the entry for each special   tool,   TMDE,   and   support   equipment.      When density    of    equipments    supported    exceeds    density spread    indicated    in    the    basis    of    issue,    the    total authorization is increased accordingly. g.  Unit of Measure  (U/M).  Indicates the standard of   the   basic   quantity   of   the   listed   item   as   used   in performing    the    actual    maintenance    function.        This measure  is  expressed  by  a  two-character  alphabetical abbreviation  (e.g.,  ea,  in,  pr,  etc.).    When  the  unit  of measure differs from the unit of issue, the lowest unit of issue  that  will  satisfy  the  required  units  of  measure  will be requisitioned. h.    Quantity  Incorporated  in  Unit.    Indicates  the quantity of the item used in the breakout shown on the illustration   figure,   which   is   prepared   for   a   functional group,   subfunctional   group,   or   an   assembly.      A   "V" appearing in this 2