TM 11-5411-211-24P/EE996-AA-PLL-0101E154 S639/TO 35E4-172-4-1
SECTION I.
INTRODUCTION
b Source, Maintenance, and Recoverabillty
1.
Scope
(SMR) Codes.
(1) Source code Source codes indicate the'
This manual lists spares and repair parts, special tools,
manner of acquiring support Items for maintenance,
special test, measurement, and diagnostic equipment
repair, or overhaul of end Items Source codes are
(TMDE), and other special support equipment required
entered in the first and second positions of the Uniform
for performance of organizational, direct support, and
SMR Code format as follows
general support maintenance of the (Shelter, Electronic
Equipment Maintenance S-639/G) It authorizes
Code
Definition
requisitioning and issue of spares and repair parts as
PA -
Item procured and stocked for
Indicated by the source and maintenance codes.
anticipated or known usage
XB -
Item is not procured or stocked If not
2.
General
available through salvage, requisition
This Repair Parts and Special Tools List is divided into
XC -
Installation
Drawing,
Diagram,
the following sections
Instruction Sheet, Field Service Drawing,
that Is Identified by Manufacturer's Part
a. Section II Repair Parts List A list of spares
Number
and repair parts authorized for use in the performance of
maintenance The list also includes parts which must be
NOTE
removed for replacement of the authorized parts Parts
Cannibalization or salvage may be used
lists are composed of functional groups in numeric
as a source of supply for any Items
sequence, with the parts in each group listed in figure
source coded above except those coded
and Item number sequence
XA and aircraft support Items as
b Section 111. Special Tools List Not applicable.
restricted by AR 700-42
c. Section IV National Stock Number and Part
Number Index A list, in National item Identification
(2) Maintenance code Maintenance codes are
number (NIIN) sequence, of all National stock numbers
assigned to indicate the levels of maintenance
(NSN) appearing in the listings, followed by a list, in
authorized to USE and REPAIR support Items The
alphameric sequence, of all part numbers appearing in
maintenance codes are entered in the third and fourth
the listings National stock numbers and part numbers
positions of the Uniform SMR Code format as follows
are cross-referenced to each illustration figure and item
(a) The maintenance code entered in the third
number appearance
position will indicate the lowest maintenance level
3.
Explanation of Columns
authorized to remove, replace, and use the support Item
a Illustration. This column is divided as follows
The maintenance code entered In the third position will
(1) Figure number Indicates the figure number of
indicate one of the following levels of maintenance
the Illustration on which the item is shown
(2) Item number The number used to identify
Code
Application/Explanation
Item called out in the Illustration.
O-Support Item is removed, replaced, used at
the organizational level
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