ARMY   TM   9-2815-254-24P AIR  FORCE  TO  38G1-94-4 3   EXPLANATION   OF   COLUMNS   (SECTIONS   II   AND   III). a ITEM   NO.   (Column   (1)).      Indicates   the   number   used   to   identify   items   called   out   in   the   illustration b. SMR   CODE   (Column   (2)).   The   Source,   Maintenance,   and   Recoverablitiy   (SMR)   code   is   a   5-position   code containing      supply/requisitioning   information,   maintenance   category   authorization   criteria,   and   disposition   instruction, as   shown   in   the   following   breakout: Source Code Maintenance Code Recoverability Code How  you  get  an  item 3rd    position Who   can   install, replace   or   use the   item. 4th   position Who   determined who   can   do disposition complete action  on  an unserviceable repair   on the   item. item. ‘Complete   Repair:   Maintenance   capacity,   capability,   and   authority   to   perform   all   corrective   maintenance tasks   of   the   'Repair   function   in   a   use/user   environment   in   order   to   restore   serviceability   to   a   failed   item. (1)   Source   Code.   The   source   code   tells   you   how   to   get   an   item   needed   for   maintenance,   repair.   or   overhaul of   an   end   item/equipment.   Explanations   of   source   codes   follows: C o d e Explanation PA PB PC** PD PE P F PG Stocked      items;   use   the   applicable   NSN   to      request/requisition   items   with these   source   codes   They   are   authorized   to   the   category   indicated   by   the code   entered   in   the   3rd   position   of   the   SMR   code. “NOTE:   Items   coded   PC   are   subject   to   deterioration. 2