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Number Office Title Date
20-111 AFS-350 Communication Interference Caused by Unintentional Keyed Microphones
Alerts the aviation community to the potential hazards created by unintentional keying of microphones resulting in radio transmissions from airborne, mobile, and ground based radio transmitters and gives guidance on alleviating ensuing hazards.
10-10-1980
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
20-35C AFS-340 Tiedown Sense
Provides updated information of general use on aircraft tie down techniques and procedures.
07-12-1983
20-43C AFS-340 Aircraft Fuel Control
Alerts the aviation community to the potential hazards of inadvertent mixing or contamination of turbine and piston fuels, and provides recommended fuel control and servicing procedures.
10-20-1976
20-103 AFS-340 Aircraft Engine Crankshaft Failure
Provides information and suggests procedures to increase crankshaft service life and to minimize failures.
03-07-1978
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
20-106 AFS-340 Aircraft Inspection for the General Aviation Aircraft Owner
Describes techniques used in aircraft inspections. Designed to familiarize owner, pilots, student mechanics, and others with inspection procedures, it does NOT qualify an individual to make airworthiness determinations.
04-01-1978
20-122A AFS-340 Anti-misfueling Devices: Their Availability and Use
Includes information relating to the Society of Automotive Engineers (SAE) standard dimensions for fueling ports now being incorporated during new aircraft production by all General Aviation Manufacturer’s Association member companies. It also makes recommendations to the fuel suppliers and Fixed Base Operators to change their fuel dispensing nozzles to meet the dimensions referenced in the SAE standard.
01-29-1991
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
20-48 AFS-330 Practice Guide for Decontaminating Aircraft
The title is self-explanatory.
05-05-1966
20-76 AFS-330 Maintenance Inspection Notes for Boeing
Provides maintenance inspection notes which can be used for the maintenance support program for certain structural parts of the B-707/720 series aircraft.
10-21-1971
20-123 AFS-330 Avoiding or Minimizing Encounters with Aircraft Equipped with Depleted Uranium Balance Weights during Accident Investigations
Provides information and guidance to individuals who come in contact with depleted uranium contained in aircraft control surfaces during accident investigations.
12-20-1984
20-142 AFS-307 Eligibility and Evaluation of U.S. Military Surplus Flight Safety Aircraft Parts, Engines, and Propellers

This advisory circular (AC) provides information and guidance for use in evaluating and determining the eligibility of U.S. military surplus flight safety critical aircraft parts (FSCAP), engines, and propellers for installation on Federal Aviation Administration (FAA) type-certificated products. This AC is applicable to all U.S. military surplus FSCAP, engines, and propellers, irrespective of when and by what process these products or parts became available. In the absence of FSCAP classification of military surplus parts by the Department of Defense (DoD), such parts should be identified and classified as FSCAP using the guidance contained in this AC. For information and guidance on determining the eligibility of parts other than FSCAP, refer to AC 20-62, Eligibility, Quality, and Identification of Aeronautical Replacement Parts. Like all AC material, this AC is not mandatory and does not constitute a regulation. It is issued for guidance purposes and to outline one method of compliance with the rules. In lieu of following the method(s) prescribed herein without deviation, a person may elect to follow an alternative method, provided the FAA finds the alternative method to be an acceptable means of complying with the applicable requirements of Title 14 of the Code of Federal Regulations (14 CFR).

02-25-2000
20-97B AFS-306 Aircraft Tire Maintenance and Operational Practices
This advisory circular (AC) provides recommended tire care and maintenance practices needed to assure the safety of support personnel and the continued airworthiness of aircraft. Specifically, this AC provides guidance on the installation, inflation, maintenance, and removal of aircraft tires. In addition, this AC provides guidance on those operational practices necessary to maintain safe aircraft operations. This AC is not mandatory and does not constitute a regulation. It is issued for guidance purposes and to outline acceptable tire maintenance and operational practices. In lieu of following this method without deviation, operators may elect to follow an alternative method that has also been found acceptable by the Federal Aviation Administration (FAA).
04-18-2005
20-62E AFS-300 Eligibility, Quality, & Identification of Aeronautical Replacement Parts

 This advisory circular (AC) provides information and guidance for use in determining the quality, eligibility and traceability of aeronautical parts and materials intended for installation on U.S. type-certificated (TC) products and articles, and to enable compliance with the applicable regulations.

12-23-2010
20-154 AFS-300 Guide for Developing a Receiving Inspection System for Aircraft Parts and Material
Provides guidance and information for incorporation into operators' existing receiving/inspection systems to help prevent the introduction of unairworthy parts into inventories.
12-12-2005
20-117 AFS-200 Hazards Following Ground Deicing and Ground Operations in Conditions Conducive to Aircraft Icing
Provides information on the identified hazards associated with ground deicing and ground operations in conditions conducive to aircraft icing.
12-03-1982
20-32B ACE-110 Carbon Monoxide (CO) Contamination in Aircraft Detection and Prevention
Provides information on the potential dangers of carbon monoxide contamination from faulty engine exhaust systems or cabin heaters of the exhaust gas heat exchanger type.
11-24-1972
20-40 ACE-100 Placards for Battery-Excited Alternators Installed in Light Aircraft
Sets forth an acceptable means of complying with placarding rules in Federal Aviation Regulations 23 and 27 with respect to battery excited alternator installations.
08-11-1965
20-44 ACE-100 Glass Fiber Fabric for Aircraft Covering
Provides a means, but not the sole means, for acceptance of glass fiber fabric for external covering of aircraft structure.
09-03-1965
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
20-113 ACE-100 Pilot Precautions and Procedures to be taken in Preventing Aircraft Reciprocating Engine Induction System and Fuel System Icing Problems
Provides information pertaining to aircraft engine induction system icing and the use of fuel additives to reduce the hazards of aircraft operation that may result from the presence of water and ice in aviation gasoline and aircraft fuel systems.
10-22-1981
20-116 ACE-100 Marking Aircraft Fuel Filler Openings with Color Coded Decals
Discusses the conditions under which color coded decals may be used to comply with the requirements in FAR Parts 23, 25, 27, and 29 for marking fuel filler openings.
09-17-1982
20-118A ACE-100 Emergency Evacuation Demonstration
Sets forth acceptable means, but not the only means, of showing compliance with the Federal Aviation Regulations (FAR) applicable to required emergency evacuation demonstrations from airplanes certified to the requirements of SFAR 23, SFAR 41, Appendix A of Part 135, or Part 23, commuter category.
03-09-1987
20-143 ACE-100 Installation, Inspection, and Maintenance of Controls for General Aviation Reciprocating Aircraft Engines
Provides guidance regarding the inspection, maintenance, and installation of engine controls with emphasis on the airframe portion of these systems. It provides a supplement to, but does not replace, the procedures in the manufacturers’ maintenance manuals. Where the content of the AC differs from, or conflicts with the manufacturers’ maintenance manual, instructions contained in the manufacturers’ manual take precedence over the guidelines provide in this AC.
06-06-2000
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