ARMY TM 9-2815-255-24P AIR FORCE TO 38G1-95-4 MARINE CORPS TM 2815-24P/2 2. General.   -   (Continued) c. Section IV. National  Stock  Number  and  Part  Number  Index. A list,    in  National  Item  Identification  Number  (NIIN)  sequence,  of all national stock    numbered items appearing in    the    listing, followed   by   a   list   in   alphanumeric sequence   of   all   part   numbers appearing  in  the  listings. National  stock  numbers  and  part  numbers are   cross-referenced   to   each   illustration   figure   and   item   number appearance. 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 Recoverability (SMR) code     is     a 5-position code containing supply/requisitioning information, maintenance category authorization criteria, and   disposition   instruction,   as   shown   in the   following   breakout: *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: 2