TO 31S9-4-31-1 Chg 1
BASIC ISSUE ITEMS LIST, ITEMS TROOP
INSTALLED OR AUTHORIZED LIST, REPAIR
PARTS AND SPECIAL TOOLS LIST
Section I. INTRODUCTION
(1) Source code. Source codes are assigned
This appendix lists basic issue items; items troop
to support items to indicate the manner of acquiring
installed or authorized; repair parts; special tools; test,
support items for maintenance, repair, or overhaul of
measurement, and diagnostic equipment (TMDE); and
end items. Source codes are entered in the first and
other support equipment required for operation and
second positions of the Uniform
performance of organizational, direct support and
SMR Code format as follows:
general support maintenance of the balanced magnetic
PA....................Item procured and stocked for
anticipated or known usage.
PB....................Item procured and stocked for insurance
The Basic Issue Items List, Items Troop Installed or
purposes because essentiality
Authorized List and Repair Parts and Special Tools List
dictates that a minimum quantity be
are divided into the following sections:
available in the supply systems.
a. Section II.
Basic Issue Items List.
Item procured and stocked and
otherwise would be coded PA except
b. Section III. Items Troop Installed or Authorized
that it is deteriorative in nature.
List. Not Applicable.
PD ...................Support item, excluding support
c. Section IV. Repair Parts List. A list of repair
equipment, procured for initial issue
parts authorized for use in the performance of
or outfitting and stocked only for
maintenance. The list also includes parts which must be
subsequent or additional initial
removed for replacement of the authorized parts. Parts
or outfittings. Not subject to
list are composed of assembly groups in ascending
numerical sequence, with the parts in each group listed
Support equipment procured and
in figure and item number sequence. Bulk materials are
stocked for initial issue or outfitting
listed in NSN sequence.
specified maintenance repair
d. Section V. Special Tools List. Not Applicable.
PF....................Support equipment which will not be
stocked but which will be centrally
e. Section VI. National Stock Number and Part
procured on demand.
Number Index. A list in ascending numerical sequence
PG ...................Item procured and stocked to provide for
of all National stock numbers appearing in the listings
sustained support for the life of the
followed by a list, in alpha-numeric sequence, of all part
equipment. It is applied to an item
numbers appearing in the listings
peculiar to the equipment which,
numbers and part numbers are cross-referenced to each
because of probable discontinuance
illustration figure and item number appearance.
or shutdown of production facilities,
would prove uneconomical to
C-3. Explanation of Columns
reproduce at a later time.
The following provides an explanation of columns found
KD ...................An item of a depot overhaul/repair kit
in the tabular listings:
and not purchased separately.
a. Illustration. This column is divided as follows:
Depot kit defined as a kit that
provides items required at the time
(1) Figure number.
Indicates the figure
overhaul or repair.
number of the illustration in which the item is shown.
KF....................An item of a maintenance kit and not
purchased separately. Maintenance
(2) Item number.
The number used to
kit defined as a kit that
identify each item called out in the illustration.
b. Source, Maintenance and Recoverability Codes
Change 1 C-1