issued by or under the direction of NAVAIR. NAVAIR publications that are important to the supply technical library are briefly described in the following paragraphs. Naval Aeronautical Publications Index The Naval Aeronautical Publications Index (NAPI) is issued in the following parts: 1. Equipment Applicability List, NA 00-500A 2. Avionics Change Cross-Reference, NA 00-500AV 3. Aircraft Application List, NA 00-500B 4. Directives Application List, NA 00-500C 5. Microfilm Cartridge Cross-Reference, NA 00-500M 6. Publications Distribution Index, NA 00-500P 7. Support Equipment Cross-Reference, NA 00-500SE 8. Airborne Weapons/Stores, Conventional/ Nuclear, Check Lists/Stores Reliability Cards/Manual, NA 01-700 9. Navy Stock List of Publications and Forms, NAVSUP P-2002 Allowance requirements registers (ARRs), allowance lists (ALs), and tables of basic allowances (TBAs) are approved by NAVAIR and published by ASO. Refer to table 1-1 for a list of common ARRs, ALs, and TBAs. Allowance Requirements Registers The allowance requirements registers (ARRs) list material and equipment for the purpose indicated in the register. Material listed in the ARR is normally retained in supply department stocks until required for use. The various ARRs are used as guides in establishing an Aviation Consolidated Allowance List (AVCAL) for ships, air stations, and MAGs. The AVCAL is a list of all items authorized to be carried in stock by these activities for support of aircraft and missiles. Allowance Lists The allowance lists (ALs) contain material and equipment for the purposes indicated in each list. The ALs are used as guides in establishing the Individual Material Readiness Lists (IMRLs). The contents of ALs include the equipment and material (both consumable and repairable) necessary to outfit and maintain units of the aeronautical organization. The ALs also identify items used with sufficient frequency to justify their issuance to all activities maintaining aircraft or equipment for which the lists are designed, and information concerning NSN, nomenclature, interchangeability, and superseded NSNs. The ALs provide detailed instructions for the applica- tion and use of each publication, as well as a table of logistic data showing the total weight and cube of all material contained in the list. Tables of Basic Allowances The tables of basic allowances (TBAs) are listings of equipment and material required for performance of specific missions, They contain both shop equipment and common supporting spare parts and include allowances of tools and material required for the use of such activities as fleet marine force (FMF) squadrons, guided missile activities, and drone-type activities, TECHNICAL MANUALS Technical manuals normally contain a listing of parts and drawings of the parts for identifica- tion purposes. The parts lists normally identify the manufacturer, manufacturer’s part number, and NSN (if one is assigned). Illustrated Parts Breakdown An illustrated parts breakdown (IPB), also known as an illustrated maintenance parts list or illustrated parts catalog, is prepared by the manufacturer for each model aircraft, engine accessory, electronic equipment, or support equip- ment (SE). It is printed and issued by the authority of NAVAIR. The IPB is designed to allow supply and maintenance personnel to identify and requisition replacement parts for aircraft or equip- ment. All procurable assemblies with detailed parts are illustrated and listed in such a manner as to make possible quick identification of assemblies and their component parts. The items are arranged continuously in assembly breakdown order with the illustrations placed as near as possible to their appropriate listing. Technical Directives Supply personnel will often be required to prepare or process requisitions for component parts required for incorporation of technical directives (TDs). Therefore, it is necessary to 1-18