TM   9-2540-205-24&P APPENDIX D UNIT, DIRECT SUPPORT AND GENERAL   SUPPORT   MAINTENANCE REPAIR  PARTS  AND  SPECIAL  TOOLS  LISTS SECTION 1. INTRODUCTION I.  Scope. This  RPSTL  lists  and  authorizes  spares  and  repair parts; special tools; special test, measurement, and diagnostic  equipment  (TMDE);  and  other  special support equipment required for performance of Unit, Direct Support and General Support Maintenance of the Heaters,  Vehicular.  It  authorizes  the  requisitioning, Issue, and disposition of spares, repair parts and special tools  as  indicated  by  the  source,  maintenance  and recoverability  (SMR)  codes. 2.  General. In addition to Section 1. Introduction, this Repair Parts and Special Tools List is divided into the following sections: a. Sect/on Il. REPAIR Parts LIST. A  list of spares and repair parts authorized by this RPSTL for use in the performance of maintenance. The list also includes parts  which  must  be  removed  for  replacement  of  the authorized parts. Parts lists are composed of functional groups in ascending alphanumeric sequence, with the parts in each group listed in ascending figure and item number sequence. Bulk materials are listed in item name sequence. Repair kits are listed separately in their own functional group within Section Il. Repair parts for repairable  special  tools  are  also  listed  in  the  section. Items   listed   are   shown   on   the   associated illustration(s)  /  figure(s). b. Section ///. Special Tool List.  A list of special tools,  special  TMDE,  and  other  special  support equipment authorized by this RPSTL (as indicated by Basis of Issue (BOL) information in DESCRIPTION AND USABLE ON CODE column) for the performance of maintenance. c. Cross-reference  Indexes.   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.  The figure and item number index lists figure and Item numbers   In alphanumeric sequence and cross-references  NSN,  CAGE  and  part    numbers. 3.Explanation  of  Columns  (Sections II and Ill). a .lTEM 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  instructions, following   breakout: as shown in the Source Code 1st two positions XXxxx How you get an item Maintenance Code I xxXXx d3position 4th  position Who can install, Who can replace  or  use do  complete the item repair”on  the  item Recoverability   Code xxxxX 5th  position Who determines disposition action on an  unserviceable  item “Complete  Repair.  Maintenance   capacity,   capability, and  authority  to  perform  all  corrective  maintenance tasks  of  the  “Repair”  function  in  a  use/user  environ- ment in order to restore service ability to a failed   item. D-1 SECTION  I