MATERIAL NOT IN CATALOG SYSTEMS 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 CAGE code. Part number. 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 chapter.) The NSN or part number of the next higher assembly. USE OF MAINTENANCE MANUALS 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 CAGEs The number of times a particular part is used on a component Parts kits needed for repair Source codes or SM&R codes Justification for buying aircraft parts or support equipment (SE) parts ILLUSTRATED PARTS BREAKDOWN (IPB) 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. Introduction 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 Contents The alphabetical index or table of contents shows the breakdown of the publication by sections. It is an 3-5