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Number Office Title Date
20-125 AFS-340 Water in Aviation Fuels
Alerts the aviation community to the potential hazards of water in aviation fuels. Additionally, it outlines recommended procedures to prevent, detect, and eliminate water in the fuel systems of aircraft.
08-12-1997
20-124 ANM-112 Water Ingestion Testing for Turbine Powered Airplanes
Describes a method of demonstrating compliance with the requirements of the FAR concerning the ingestion of water from the runway/taxiway surface into the airspeed system, the engine, and essential auxiliary power unit air inlet ducts of turbine engine power unit air inlet ducts of turbine engine powered airplanes.
09-30-1985
20-127 ANM-110B Use of Society of Automotive Engineers (SAE) Class H11 Bolts
Provides guidance on the use of SAE Class H11 bolts in primary structure on all aircraft, including gliders and manned free balloons, and on aircraft engines and propellers.
07-08-1987
20-77A AFS-350 Use of Manufacturers' Maintenance Manuals
Informs owners and operators about the usefulness of manufacturers’ maintenance manuals for servicing, repairing, and maintaining aircraft, engines and propellers.
04-06-2007
20-29B ANE-100 Use of Aircraft Fuel Anti-icing Additives
Provides information on the use of anti-icing additives PFA-55MB and Mil-I-27686 as an acceptable means of compliance with the FARs that require assurance of continuous fuel flow under conditions where ice may occur in turbine aircraft fuel systems.
01-18-1972
20-65A AIR-200 U.S. AIRWORTHINESS CERTIFICATES AND AUTHORIZATIONS FOR OPERATION OF DOMESTIC AND FOREIGN AIRCRAFT
Provides general information and guidance concerning issuance of airworthiness certificates for U.S. registered aircraft, and issuance of special flight authorizations for operation in the United States of foreign aircraft not having standard airworthiness certificates issued by the country of registry.
07-08-2004
20-147 AIR-100 Turbojet, Turboprop, and Turbofan Engine Induction System Icing and Ice Ingestion
This advisory circular (AC) provides guidance and acceptable methods, but not the only methods, for demonstrating compliance with the applicable engine induction system icing and engine ice ingestion requirements. These requirements are applicable to the Federal Aviation Regulations, parts 23, 25, and 33 of Title 14 of the Code of Federal Regulations (14 CFR parts 23, 25, and 33). The primary purpose of this AC is to reduce inconsistencies and eventual surprises to both engine manufacturers and engine installers, when installing a part 33 certified engine in a part 23 or 25 aircraft.
02-02-2004
20-35C AFS-340 Tiedown Sense
Provides updated information of general use on aircraft tie down techniques and procedures.
07-12-1983
20-134 AIR-120 Test Procedures for Maximum Allowable Airspeed Indicators
Provides guidance concerning test procedures which may be used in showing compliance with the standards in technical standards orders C 46a.
02-14-1990
20-33B AIR-100 Technical Information Regarding Civil Aeronautics Manuals 1, 3, 4a, 4b, 5, 6, 7, 8, 9, 13, and 14
Advises the public that policy information contained in the subject Civil Aeronautics Manuals may be used in conjunction with specific sections of the Federal Aviation Regulations.
05-01-1975
20-96 AIR-200 Surplus Military Aircraft: A Briefing for Prospective Buyers
Provides many answers to questions regarding the purchasing of surplus military aircraft (type certification, is the aircraft flyable, is it sold for spare parts, scrap?).
12-02-1976
20-41A AIR-120 Substitute Technical Standard Order (TSO) Aircraft Equipment
Sets forth an acceptable means for complying with rules governing aircraft equipment installations in cases involving the substitution of technical standard order equipment for functionally similar TSO approved equipment.
04-05-1977
20-109A AFS-620 Service Difficulty Program (General Aviation)
Describes the Service Difficulty Program as it applies to general aviation activities. Instructions for completion of the revised FAA Form 8010-4 (10-92), Malfunction or Defect Report, are provided.
04-08-1993
20-45 ACE-100 Safetying of Turnbuckles on Civil Aircraft
Provides information on turnbuckle safetying methods that have been found acceptable by the FAA during past aircraft type certification programs.
09-17-1965
20-104 AIR-120 Revised Powerplant Engineering Report No. 3A Standard Fire Test Apparatus and Procedure (for Flexible Hose Assemblies)
Announces the availability of the subject report.
07-19-1978
20-148 AIR-100 Reusable Software Components
Supplies one means for developers, integrators and applications to gain FAA acceptance of software.
12-07-2004
20-68B AFS-600 Recommended Radiation Safety Precautions for Ground Operation of Airborne Weather Radar
Sets forth recommended radiation safety precautions for ground operation of airborne weather radar.
08-08-1980
20-144 ANM-100 Recommended Method for FAA approval of Aircraft Fire Extinguishing System Components
Provides guidance on the various aspects that should be considered in the FAA approval process of fire extinguishing system components manufactured under a Production Certificate (PC), components to be FAA approved under the Part Manufacturer Approval (PMA) process, or design changes to components originally approved by either method. This AC does not constitute a regulation, however, it provides a method, for obtaining approval of aircraft fire extinguishing system components. This is intended to enhance the standardization of all FAA Aircraft Certification Offices (ACO) and Manufacturing Inspection District Offices (MIDO) in the approval process of the critical components of an aircraft fire extinguishing system.
09-22-2000
20-105B AFS-340 Reciprocating Engine Power-Loss Accident Prevention and Trend Monitoring
Updates statistical information and brings to the attention of aircraft owners, operators, manufacturers, and maintenance personnel the circumstances surrounding engine power-loss accidents with recommendations on how those accidents can be prevented.
06-15-1998
20-152 AIR-100 RTCA, Inc., Document RTCA/DO-254, Design Assurance Guidance for Airborne Electronic Hardware
This advisory circular (AC) applies to manufacturers and installers of products or appliances incorporating complex custom micro-coded components with hardware design assurance levels of A, B, and C. These complex custom micro-coded components include application specific integrated circuits (ASIC), programmable logic devices (PLD), field programmable gate arrays (FPGA), or similar electronic components used in the design of aircraft systems and equipment. This AC provides a means (but not the only means) to gain Federal Aviation Administration (FAA) approval by showing the equipment design is appropriate for its intended function. Further, using this AC will help you satisfy airworthiness requirements when these types of electronic components are implemented
07-05-2005
20-18A ANE-100 Qualification Testing of Turbo-jet Engine Thrust Reversers
Discusses the requirements for the qualification of thrust reversers and sets forth an acceptable means of compliance with the tests prescribed in Federal Aviation Regulations, Part 33, then run under nonstandard ambient air conditions.
03-16-1966
20-53B AIR-100 Protection of Aircraft Fuel Systems Against Fuel Vapor Ignition Caused by Lightning
Provides information and guidance concerning an acceptable means, but not the only means, of compliance with Parts 23 or 25 of the Federal Aviation Regulations (FAR) applicable to preventing ignition of fuel vapors due to lightning.
06-05-2006
20-66B ANE-111 Propeller Vibration and Fatigue

This advisory circular (AC) provides guidance and describes one method, but not the only method, for demonstrating compliance with §§ 23.907 and 25.907 of Title 14 of the Code of Federal Regulations (14 CFR) for the evaluation of vibratory stresses on propellers installed on airplanes. This evaluation uses fatigue and structural data obtained in accordance with 14 CFR part 35.

03-24-2011
20-34D AFS-340 Prevention of Retractable Landing Gear Failures
Updates statistical information related to landing accidents involving aircraft with retractable landing gear and suggests procedures to minimize those accidents.
08-08-1980
20-48 AFS-330 Practice Guide for Decontaminating Aircraft
The title is self-explanatory.
05-05-1966
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