TM 11-4940-246-24P-2
SECTION I
INTRODUCTION
1. Scope
(2) Maintenance code. Maintenance codes are
This manual lists spares and repair parts; special tools;
assigned to indicate the levels of maintenance
special test, measurement, and diagnostic equipment
authorized to USE and REPAIR support items. The
(TMDE), and other special support equipment required
maintenance codes are entered in the third and fourth
for performance of organizational, direct support, and
positions of the Uniform SMR Code format as follows:
(a) The maintenance code entered in the third
general support maintenance of the AN/USM-109A. It
authorizes the requisitioning and issue of spares and
position will indicate the lowest maintenance level
repair parts as indicated by the source and mainte-
authorized to remove, replace, and use the support
nance codes.
item. The maintenance code entered in the third posi-
tion will indicate one of the following levels of mainte-
2. General
nance:
This Repair Parts and Special Tools List is divided into
Application/Explanation
Code
the following sections:
O --Support item is removed, replaced, used at the
a Section III. Repair Parts List. A list of spares and
organizational level.
repair parts authorized for use in the performance of
F -Support item is removed, replaced, used at the
maintenance. The list also includes parts which must
direct support level.
be removed for replacement of the authorized parts.
H -Support item is removed, replaced, used at the
Parts lists are composed of functional groups in
general support level.
numeric sequence, with the parts in each group listed
(b) The maintenance code entered in the fourth
in figure and item number sequence.
position indicates whether the item is to be repaired
b. Section Ill. Special Tools List. Not applicable.
and identifies the lowest maintenance level with the
c. Section IV. National Stock Number and Part
capability to perform complete repair (i.e., all
Number Index. A list, in National item identification
authorized maintenance functions). This position will
number (NIIN) sequence, of all National stock numbers
contain one of the following maintenance codes:
(NSN) appearing in the listings, followed by a list, in
Application/Explanation
Code
alphameric sequence, of all part numbers appearing in
F -The lowest maintenance level capable of com-
the listings. National stock numbers and part numbers
plete repair of the support item is the direct
are cross-referenced to each illustration figure and
support level.
item number appearance.
H -The lowest maintenance level capable of com-
3. Explanation of Columns
plete repair of the support item is the general
a Illustration This column is divided as follows:
support level.
(1) Figure number. Indicates the figure number of
Z -Nonreparable. No repair is authorized.
the illustration on which the item is shown.
(3) Recoverability code. Recoverability codes are
(2) Item number. The number used to identify
assigned to support items to indicate the disposition ac-
item called out in the illustration.
tion on unserviceable items. The recoverability code is
b. Source, Maintenance, and Recoverability (SMR)
entered in the fifth position of the Uniform SMR Code
Codes.
format as follows:
(1) Source code. Source codes indicate the manner
Recoverability
of acquiring support items for maintenance, repair, or
codes
Definition
overhaul of end items. Source codes are entered in the
Z -Nonreparable item. When unserviceable, con-
first and second positions of the Uniform SMR Code
demn and dispose at the level indicated in posi-
format as follows:
tion 3.
Code
Definition
F -Reparable item. When uneconomically reparable,
PA-Item procured and stocked for anticipated or
condemn and dispose at the direct support
known usage.
level.
XD-A support item that is not stocked. When re-
H -Reparable item. When uneconomically reparable,
quired, item will be procured through normal
condemn and dispose at the general support
supply channels.
level.
NOTE
Cannibalization or salvage may be used as a
A -Item requires special handling or condemnation
procedures because of specific reasons (i.e.,
source of supply for any items source coded
precious metal content, high dollar value, criti-
above except those coded XA and aircraft
cal material or hazardous material). Refer to
support items as restricted by AR 700-42.
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