ARMY   TM   9-2815-253-24P AIR  FORCE  TO  38G1-93-4 MARINE  CORPS  TM  2815-24P/1 3 EXPLANATION OF COLUMNS (SECTION 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: Source Maintenance Code code I 1 1st two x  x positions x  x + I 1 x  x + How   you   get   an   item 3rd   position Who can install, replace or use the item. 4th   position Who can do complete repair*  on the  item. Who determined disposition action on an unserviceable item. ‘Complete  Repair:  Maintenance  capacity,  capability,  and  authority  to  perform  all  corrective  maintenance task   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  and  item/equipment.  Explanations  of  source  codes  follows: Code Explanation PA PB PC PD PE PF PG Stocked  items;  use  the  applicable  NSN  to  rcquest/requisition  items  with these source codes. They are authorized to the category indicated by the code  enter  in  the  3rd  position  of  the  SMR  code “NOTE:  Items  coded  PC  are  subject  to  deterioration. 2