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Number Office Title Date
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.
91-54 AFS-820 Automatic Reporting Systems Altimeter Setting and Other Operational Data
Provides guidelines for the development and installation of automatic reporting systems for altimeter setting and other operational data intended for use in connection with IFR operations.
61-47A AFS-820 Use of Approach Slope Indicators for Pilot Training
This advisory circular informs pilot schools, flight instructors, and student IJilots of the recommendation of the Federal Aviation Administration for the use of approach slope indicator systems for pilot training.
91-14D AFS-340 Altimeter Setting Sources
Provides the aviation public and industry with guidelines for setting up reliable altimeter setting sources.
91-13C AFS-820 Cold Weather Operation of Aircraft
Provides background and guidelines relating to operation of aircraft in the colder climates where wide temperature changes may occur.
135.169-1 AIR-110 Small Propeller-Driven Air Taxi Airplanes that meet Sections 135.169 (formerly 135.144)
Provides a summary of and information on small propeller-driven air taxi airplanes that comply with section 135.169(b) and may continue operations under FAR 135 with ten or more passenger seats.
133-1A AFS-824 Rotorcraft External-Load Operations in Accordance with Federal Aviation Regulations Part 133
Provides information for persons interested in applying for a Rotorcraft External-Load Operator Certificate.
150/5360-9 APP-400 Planning and Design of Airport Terminal Facilities at Non-Hub Locations

Provides guidance material for the planning and design of airport terminal buildings at non-hub locations.

Note: Portions of this AC are under review for update. Please contact the National Planning and Environmental Division for assistance.

Because of the size of this document (5.28 MB), it is available as one large file (see Complete) or as several smaller files (see Parts 1-4).

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.
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.
60-6B AFS-820 Airplane Flight manuals (AFM), Approved Manual Materials, Markings, and Placards Airplanes
Calls attention to the regulatory requirements relating to the subject and provides information to aid pilots to comply with these requirements.
120-38 AFS-260 Transport Category Airplanes Cabin Ozone Concentrations
Provides guidance concerning acceptable means, but not the only means, for an air carrier to demonstrate compliance with the maximum permissible cabin ozone (03) concentrations established by Section 121.578 of the Federal Aviation Regulations.
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.
43-2B AFS-343 Minimum Barometry for Calibration and Test of Atmospheric Pressure Instruments
Provides guidance material which may be used to determine the adequacy of barometers used in the calibration of aircraft static instruments and presents information concerning the general operation, calibration, and maintenance of such barometers.
91-55 AFS-310 Reduction of Electrical System Failures following Aircraft Engine Starting
Warns general aviation aircraft owner/pilots and maintenance personnel of possible total electrical system failure following aircraft engine starting.
120-39 AFS-331 Hazards of Waste Water Ice Accumulation Separating from Aircraft in Flight
This advisory circular emphasizes the potential hazards to life and property due to lavatory fluid and potable water systems’ ice accumulation and resultant separation from aircraft in flight.
91-44A AIR-120 Operational and Maintenance Practices for Emergency Locator Transmitters and Receivers
Combines and updates material in several Advisory Circulars on the subject of emergency locator transmitters (ELT) receivers for airborne service.
125-1 AFS-820 Operations of Large Airplanes Subject to Federal Aviation Regulations Part 125
Sets forth one means that would be acceptable to the Administrator to assist persons in complying with the requirements of FAR Part 125. It also provides (in Chapter 1) a test of applicability for those operations, which may be subject to Part 125.
170-6C ASM-500 Use of Radionavigation Land Test Station and Signal Generators
Gives information as to the frequencies on which the FAA will authorize and the FCC will license radionavigation land test stations. It also discusses the interference potential of signal generators operating in aeronautical bands of the radio spectrum and how this interference can be alleviated.
135-9 AFS-220 FAR Part 135 Icing Limitations
To provide guidance to commuter/air taxi operators to assist them to comply with Section 135.227.
91-57 ATO-220 Model Aircraft Operating Standards
Outlines, and encourages voluntary compliance with, safety standards for model aircraft operators.
121-26 AFS-250 Airports--Required Data
Provides guidance as to acceptable methods for compliance with changes to the Federal Aviation Regulations 121.97(b) and 121.117(b).
20-30B AIR-120 Aircraft Position Light and Anticollision Light Installations
Sets forth acceptable means, but not the only means, of showing compliance with the Federal Aviation Regulations (FAR) applicable to installed position lights and anti-collision lights.
108-1 ACS-3 Air Carrier Security
Provides information and guidance for implementation of new FAR 108, Airplane Operator Security
108-2 ACS-3 Security Rules - Carriage of Weapons and Escorted Persons
Provides information and guidance for implementation of FARs 108.11 and 108.21 concerning the carriage of weapons and passengers under the control of armed law enforcement escorts.
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