SECTION I TM 9-2350-277-24P UNIT MAINTENANCE, DIRECT SUPPORT AND GENERAL SUPPORT MAINTENANCE REPAIR PARTS AND SPECIAL TOOLS LIST (INCLUDING DEPOT MAINTENANCE PARTS) SECTION I.  INTRODUCTION 1.  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  M113A3,  M981A3, M1064A3,  M1068A3,  M577A3,  M1059A3  and  M901  A3 vehicles.      It   authorizes   the   requisitioning,   issue,   and disposition  of  spares,  repair  parts  and  special  tools  as indicated  by  the  source,  maintenance  and  recoverability (SMR) code. 2.  General In  addition  to  Section  I.    Introduction,  this  Repair  Parts and   Special   Tools   List   is   divided   into   the   following sections: a. Section  II.    Repair  Parts  Lists.    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  II.    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 III.    Special  Tools  List.    A  list  of  special tools, special TMDE, and other special support equipment   authorized   by   this   RPSTL   (as   indicated   by Basis  of  Issue  (BOI)  information  in  DESCRIPTION  AND USABLE   ON   CODE   column)   for   the   performance   of maintenance. c. Section IV.    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-reference NSN, CAGE and part number. 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   instructions,   as   shown   in   the   following breakout: Source Code 1st two positions XXxxx How you get an item Maintenance Code xxXXx 3rd position 4th position Who can install, Who can replace or use do complete the item repair on the item Recoverability Code xxxxX 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 environment in order to restore serviceability to a failed item. 1