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TM 11-5895-687-34 P-4
INTRODUCTION
Definition
Code
1. Scope
initial issues or outfittings. Not subject to
This manual lists repair parts required for per-
automatic replenishment.
formance of direct support and depot maintenance
XAItem is not procured or stocked because the
of the RT-903/TPX-50.
requirements for the item will result in the
2. General
replacement of the next higher assembly.
This Repair Parts and Special Tools Lists is
XDA support item that is not stocked. When
divided into the following sections:
required, item will be procured through
a Section II. Repair Parts List. A list of repair
normal supply channels.
parts authorized for use in the performance of
NOTE
maintenance. The list also includes parts which
Cannibalization or salvage may be used as
must be removed for replacement of the authorized
a source of supply for any items source-
parts. Parts lists are composed of functional
coded above, except those coded XA, XD,
groups in ascending numerical sequence, with the
and aircraft support items as restricted by
parts in each group listed in figure and item
AR 700-42.
number sequence.
(2) Maintenance code. Maintenance codes are
b. Section III. Special Tools List. Not ap-
assigned to indicate the levels of maintenance
plicable.
authorized to USE and REPAIR support items.
c. Section IV. National Stock Number and Part
The maintenance codes are entered in the third and
Number Index. A list, in ascending numerical
fourth positions of the Uniform SMR Code format
sequence, of all National stock numbers appearing
as follows:
in the listings, followed by a list, in alpha-numeric
{a) The maintenance code entered in the
sequence, of all part numbers appearing in the
third position will indicate the lowest maintenance
listings. National stock numbers and part numbers
level authorized to remove, replace, and use the
are cross-referenced to each illustration figure and
support item. The maintenance code entered in the
item number appearance.
third position will indicate one of the following
3. Explanation of Columns
levels of maintenance:
Application/Explanation
Code
The following provides an explanation of columns
OSupport item is removed, replaced, used at the
found in the tabular listings:
organizational level.
a. Illustration. This column is divided as
follows:
F Support item is removed, replaced, used at the
direct support level.
(1) Figure number.  Indicates the figure
D Support items that are removed, replaced,
number of the illustration in which the item is
used at depot, mobile depot, specialized
shown.
repair activity only.
(2) Item number. The number used to identify
NOTE
each item called out in the illustration.
Codes "I" end "F" will be considered the
b. Source, Maintenance, and Recoverability
same by direct support units.
Codes (SMR).
(b) The maintenance code entered in the
(1) Source code. Source codes are assigned to
fourth position indicates whether the item is to be
support items to indicate the manner of acquiring
repaired end identifies the lowest maintenance level
support items for maintenance, repair, or overhaul
with the capability to perform complete repair (i.e.,
of end items. Source codes are entered in the first
all authorized maintenance functions). This
and second positions of the Uniform SMR Code
position will contain one of the following main-
format as follows :
Code
Definition
tenance codes:
Code
Application/Explanation
PA Item procured and stocked for anticipated or
FThe lowest maintenance level capable of
known usage.
complete repair of the support item is the
PDSupport item, excluding support equipment,
direct support level.
procured for initial issue or outfitting and
DThe lowest maintenance level capable of
stocked only for subsequent or additional
3

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