MATERIAL NOT IN CATALOG
LEARNING OBJECTIVE: Describe the
publications used by the maintenance
technician to order replacement parts.
At times you will need a part that is not subject to
the cataloging system and cannot be identified by an
NSN. You must describe your requirement for a part
not identified by an NSN in terms familiar to the
supplier. If you can provide the following information
about the part to supply, you will have supplied enough
information for supply to requisition the needed part.
In most situations, the information required can be
found in the illustrated parts breakdown (IPB) or the
maintenance instruction manual (MIM).
Name of the manufacturer of the part or the
Nomenclature (noun name).
Description of specific application, including the
model aircraft, engine, accessory, or other end
assembly where the part is used.
Source, Maintenance, and Recoverability
(SM&R) code and reference, if available.
(SM&R and reference are dealt with later in this
The NSN or part number of the next higher
USE OF MAINTENANCE
Maintenance manuals can provide you with useful
supply information. Along with repair information,
they provide the following additional information:
A picture of the desired part
Interchangeability, equipment application, and
next higher assemblies
Bureau numbers of aircraft and serial numbers
of equipment on which a part is used
The number of times a particular part is used on
Parts kits needed for repair
Source codes or SM&R codes
Justification for buying aircraft parts or support
equipment (SE) parts
An IPB is prepared by the manufacturer for each
model aircraft, engine, accessory, electronic
equipment, or other aeronautical equipment purchased
for the Naval Air Systems Command (NAVAIR). The
IPB helps supply and maintenance personnel identify
and order replacement parts for the aircraft or
equipment. The IPB shows and lists procurable
assemblies and detail parts so you can quickly identify
assemblies and their components. Items are arranged
in assembly breakdown order, with the illustrations
placed as near as possible to their listing.
Slight format variations exist among IPBs.
However, each includes an introduction, a table of
contents or alphabetical index, a group assembly parts
list, and a numerical index.
The introduction includes general information and
instructions for using the publication. Refer to it before
using an unfamiliar IPB. The introduction of a single
volume IPB is at the front of the publication. In
multivolume IPBs, the introduction is usually in the
same volume as the numerical index. The introduction
provides the following types of information.
Table of contents or alphabetical index.
Listing of supplementary handbooks.
Procedures on using that particular IPB.
Definition of columns and terms used in the
group assembly parts list section of the IPB.
Brief explanation and listing of applicable
technical directives (TDs) to the IPB.
Information concerning the arrangement of the
numerical index section.
Explanation of SM&R and "Usable On" codes
used in the IPB. This is particularly useful when
problems arise with cross-referencing a part
number to an NSN.
Alphabetical Index or Table of
The alphabetical index or table of contents shows
the breakdown of the publication by sections. It is an