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TM 11-5821-244-34P
SECTION I
INTRODUCTION
b. Source, Maintenance, and Recoverability
1. Scope
(SMR) Codes.
This appendix lists spares and repair parts;
(1) Source code. Source codes indicate the
special tools; special test, measurement, and
manner of acquiring support items for main-
diagnostic equipment (TMDE), and other special
tenance, repair, or overhaul of end items. Source
support equipment required for performance of
codes are entered in the first and second posi-
organizational,  d i r e c t s u p p o r t , a n d d e p o t
tions of the Uniform SMR Code format as follows:
maintenance of the Radio Set AN/ARC-54. It
authorizes requisitioning and issue of spares and
Code
Definition
repair parts as indicated by the source and
maintenance codes.
PA --Item procured and stocked for antici-
pated or known usage.
2. General
XB --Item includedin both a depot
This Repair Parts and Special Tools List is divided
overhaul/repair kit and a mainte-
into the following sections:
nance kit.
a. Section II. Repair Parts List. A list of spares
(2) Maintenance code.  Maintenance codes
and repair parts authorized for use in the perfor-
are assigned to indicate the levels of maintenance
mance of maintenance. The list also includes
authorized to USE and REPAIR support items. The
parts which must be removed for replacement of
maintenance codes are entered in the third and
the authorized parts. Parts lists are composed of
fourth positions of the Uniform SMR Code format
functional groups in numeric sequence, with the
as follows:
parts in each group listed in figure and item
number sequence.
(a) The maintenance code entered in the
third position will indicate the lowest
b. Section III. Special Tools List. N o t
maintenance level authorized to remove, replace,
applicable.
and use the support item. The maintenance code
entered in the third position will indicate one of
c. Section IV. National Stock Number and Part
the following levels of maintenance:
Number Index. A list, in National item identifica-
tion number (NIIN) sequence, of all National stock
ApplicationlExplanation
Code
numbers (NSN) appearing in the listings, followed
by a list, in alphameric sequence, of all part
O -- Support item is removed, replaced,
numbers appearing in the listings. National stock
used at the organizational level.
numbers and part numbers are cross-referenced
F -- Support item is removed, replaced,
t o each illustration figure and item number
used at the direct support level.
appearance.
D -- Support items that are removed,
r e p l a c e d , used at depot, mobile
3. Explanation of Columns
depot, or specialized repair activity
only.
a. Illustration. This column is divided as
follows:
(b) The maintenance code entered in the
fourth position indicates whether the item is to be
(1) Figure number. Indicates the figure
repaired and identifies the lowest maintenance
number of the illustration on which the item is
level with the capability to perform complete
shown.
repair (i.e., all authorized maintenance functions).
This position will contain one of the following
(2) Item number. The number used to iden-
maintenance codes:
tify item called out in the illustration.
1


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