TM 55-1730-226-23P
SECTION I. INTRODUCTION
1. Scope. This RPSTL lists and authorizes spares and repair parts; special tools; special test, measure-
ment, and diagnostic equipment (TMDE); and other special support equipment required for performance of
Aviation Unit and Aviation Intermediate maintenance of the Oxygen Servicing Unit. It authorizes the re-
quisitioning, issue, and disposition of spares, repair parts and special tools as indicated by the source,
maintenance and recoverability (SMR) codes.
2. General. In addition to Section I, Introduction, this Repair Parts and Special Tools List is divided in-
to the following sections:
a. Section II. Repair Parts List.
A list of spares and repair parts authorized by this RPSTL for use in
the performance of maintenance. The list also includes parts which must be removed for replacement of the
authorized parts. Parts lists are composed of functional groups in ascending alphanumeric sequence, with
the parts in each group listed in ascending figure and item number sequence. Bulk materials are listed in
item name sequence. Repair parts kits are listed separately in their own functional group within Section 11.
Repair parts for repairable special tools are also listed in this section. Items listed are shown on the
associated illustration(s) figure(s).
b. Section III. Special Tools List.
A list of special tools, special TMDE, and other special support
equipment authorized by this RPSTL (as indicated by Basis of Issue (BOI) information in DESCRIPTION
AND USABLE ON CODE column) for the performance of maintenance. (Not applicable)
c. Section IV. National Stock Number and Part Number Index. A list, in National Item Identification
Number (NIIN) sequence, of all National stock numbered items appearing in the listing, followed by a list
in alphanumeric sequence of all part numbers appearing in the listings. National stock numbers and part
numbers are cross-referenced to each illustration figure and item number appearance.
3. Explanation of Columns (Sections II and III).
a. Item No. (Column (l)). Indicates the number used to identify items called out in the illustration.
b. SMR Code (Column (2)). The Source, Maintenance, and Recoverability (SMR) code is a 5-position
code containing supply/requisitioning information, maintenance category authorization criteria, and
disposition instruction, as shown in the following breakout:
Source
Code
Maintenance
Recoverability
Code
Code
3d position
4th position
Who determined
disposition
Who can install,
Who can do
action on an
replace or use
complete repair*
unserviceable
the item
on the item
item
*Complete Repair: Maintenance capacity, capability, and authority to perform all corrective mainte-
nance tasks of the “Repair” function in a use/user environment
in order to restore serviceability to a fail
ed item.
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