TM 10-5410-221-34P-1 Section I. INTRODUCTION 1.  Scope This    manual    lists    repair    parts,    special    tools,    test, measurement,  and  diagnostic  equipment  (TM-DE),  and other   support   equipment   required   for   operation   and performance    of    direct    support    and    general    support maintenance of the Expandable Shelter. 2.  General a.    Section  II-Repair  Parts  List.    A  list  of  repair parts     authorized     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 numerical sequence, with the parts in each group listed in figure and item number sequence. b.  Section III-Special Tools List.  A list of special tools, TMDE, and support equipment authorized for the performance  of  maintenance,  at  the  direct  support  and general support levels. c.    Section  IV--National  Stock  Number  and  Part Number Index.  A list, in ascending numerical sequence, of  all  National  stock  numbers  appearing  in  the  listings, followed by a list, in alphanumeric sequence, of all part numbers    appearing    in    the    listings.        National    stock number and part numbers are cross-referenced to each illustration figure and item number appearance. 3.  Explanation of Columns The following provides an explanation of columns found in the tabular listings: a.  Illustration.  This column is divided as follows: (1)      Figure   number.      Indicates   the   figure number of the illustration in which the item is shown. (2)      Item   number.      The   number   used   to identify each item called out in the illustration. b.      Source,   Maintenance,   and   Recoverability   Codes (SMR ). (1)        Source    code.        Source    codes    are assigned   to   support   items   to   indicate   the   manner   of acquiring   support   items   for   maintenance,   repair,   or overhaul of end items.  Source codes are entered in the first  and  second  positions  of  the  Uniform  SMR  Code format as follows: Code Definition PA Item   procured   and   stocked   for   anticipated   or known usage. PB Item procured and stocked for insurance purpose because   essentially   dictates   that   a   minimum quantity be available in the supply systems. PC Item  procured  and  stocked  and  which  otherwise would be coded PA except that it is deteriorative in nature. PD Support item, excluding support equipment, procured    for    initial    issue    or    outfitting    and stocked  only  for  subsequent  or  additional  initial issues  or  outfittings.    Not  subject  to  automatic replenishment. Code Definition PE Support    equipment    procured    and    stocked    for initial issue or outfitting to specified maintenance repair activities. PF Support  equipment  which  will  not  be  stocked  but which will be centrally procured on demand. PG Item     procured     and     stocked     to     provide     for sustained  support  for  the  life  of  the  equipment. It    is    applied    to    an    item    peculiar    to    'the equipment which, because of probable discontinuance or shutdown of production facilities, would prove uneconomical to reproduce at a later time. KD An   item   of   a   depot   overhaul/repair   kit   and   not purchased separately.  Depot kit defined as a kit that   provides   items   required   at   the   time   of overhaul or repair. KF An  item  of  a  maintenance  kit  and  not  purchased separately.  Maintenance kit defined as a kit that provides    an    item    that    can    be    replaced    at organizational or intermediate levels of maintenance. KB Item  included  in  both  a  depot  overhaul/repair  kit and a maintenance kit. MO Item     to     be     manufactured     or     fabricated     at organizational level. MF Item to be manufactured or fabricated at the direct support maintenance level. MH Item   to   be   manufactured   or   fabricated   at   the general support maintenance level. MD   Item to be manufactured  or fabricated at the depot maintenance level. AO Item to be assembled at organizational level. AF Item to be assembled at direct support maintenance level. AH Item to be assembled at general support maintenance level. AD Item to be assembled at depot maintenance level. XA Item   is   not   procured   or   stocked   because   the requirements   for   the   item   will   result   in   the replacement of the next higher assembly. XB Item  is  not  procured  or  stocked.    If  not  available through salvage, requisition. XD A    support    item    that    is    not    stocked.        When required,  item  will  be  procured  through  normal supply channels. NOTE Cannibalization   or   salvage   may   be used  as  a  source  of  supply  for  any items   source   coded   above   except those coded XA or XD. (2)    Maintenance  code.    Maintenance  codes  are assigned to indicate the levels of maintenance authorized    to    use    and    repair    support    items.        The maintenance  codes  are  entered  in  the  third  and  fourth positions of the Uniform SMR Code format as follows: 1