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90-108 AFS-400 Use of suitable Area navigation (RNAV) system on Conventional Routes and Procedures - Change 1

This advisory circular (AC) provides operational and airworthiness guidance regrading the suitablity and use of RNAV systems while operating on or transitioning to, conventional i.e. non-RNAV, routes and procedures within the United States (US) National Airspace System (NAS).

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
91-65 AFS-820 Use of Shoulder Harness in Passenger Seats Provides guidance and information to pilots, passengers, and maintenance personnel regarding the crash survivability aspects of small aircraft equipped with shoulder harnesses and the hazards of modifying seats, adding appendages to seats, and storage of articles, beneath the seats. Recommends inspection and maintenance of seats, lap belts and shoulder harnesses to enhance their effectiveness for crash survivability. 08-04-1986
120-107 AFS-200 Use of Remote On-Ground Ice Detection System

This advisory circular (AC) provides a standard means for a certificate holder to obtain approval for use of a Remote On-Ground Ice Detection System (ROGIDS). The purpose of this system is to identify clear ice after deicing as a replacement for or to augment the post-deicing visual and tactile check of aircraft surfaces. This approval is essential to the ground-deicing/anti-icing program contained within Title 14 of the Code of Federal Regulations (14 CFR) part 121, § 121.629, part 135, § 135.227, or part 125, § 125.221

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. 02-13-1981
91.21-1C AFS-300 Use of Portable Electronic Devices Aboard Aircraft

This advisory circular (AC) provides aircraft owners, operators, and the public with information and guidance for assistance in compliance with Title 14 of the Code of Federal Regulations (14 CFR) part 91, § 91.21. Section 91.21 was established because of the potential for portable electronic devices (PED) to interfere with aircraft navigation or communication systems. It prohibits the operation of PEDs not installed aboard U.S.-registered civil aircraft while operating under instrument flight rules (IFR). This rule permits the use of specified PEDs and other devices that the operator of the aircraft has determined will not interfere with the safe operation of that aircraft. The recommendations contained herein are one means, but not the only means, of complying with § 91.21 requirements pertaining to the operation of PEDs.

150/5370-11B AAS-100 Use of Nondestructive Testing in the Evaluation of Airport Pavements

Focuses on nondestructive testing (NDT) equipment that measures pavement surface deflections after applying a static or dynamic load to the pavement. It also briefly introduces other types of nondestructive measuring equipment to illustrate how supplementing NDT data with other test data may improve the quality and reliability of the pavement evaluation. This version updates Chapter 8, NDT-Based Evaluation and Design Updates, to reflect the requirements of the pavement design program FAARFIELD rather than the previous design program LEDFAA.

See also Airport Design Software.

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
120-112 AFS-200 Use of Liquid Water Equivalent System to Determine Holdover Times or Check Times for Anti-Icing Fluids

This advisory circular (AC) provides guidance for the Federal Aviation Administration’s (FAA) standard for a Liquid Water Equivalent System (LWES). This AC applies to anyone proposing to design, procure, construct, install, activate, or maintain an LWES. An LWES is an automated weather measurement system that determines the Liquid Water Equivalent (LWE) rate in conditions of frozen or freezing precipitation. The LWE rate is used by the system with the appropriate endurance time (ET) regression equations and regression coefficients specified in an FAA-approved current database at to determine the holdover time (HOT) or check time (CT) for an aircraft’s applied anti-icing fluid (Society of Automotive Engineer (SAE) Types I, II, III, and IV). Thus, the LWES incorporates a Holdover Time Determination System (HOTDS) or Check Time Determination System (CTDS). The HOT is used to determine how long a fluid would provide protection assuming that the current conditions do not change. The CT is used to determine the fluid’s current protection capability, while incorporating varying weather conditions.

00-63A AFS-400 Use of Cockpit Displays of Digital Weather and Aeronautical Information

This advisory circular (AC) provides guidance to flightcrew members and other airmen on the use of data link to access Flight Information Services (FIS). This AC addresses both the Federal Aviation Administration (FAA) FIS Broadcast (FIS-B) provided through the Automatic Dependent Surveillance – Broadcast (ADS-B) Universal Access Transceiver (UAT) network and non-FAA FIS systems provided through commercial data link services.

a. Flight Information Services (FIS). FIS is a service that provides Meteorological Information (METI) and Aeronautical Information (AI) to enhance pilot awareness of weather and/or airspace constraints while providing information for decision support tools and improving safety. METI and AI data link services enable flightcrews to support the Next Generation Air Transportation System (NextGen) concepts of information sharing and provide airmen with a common operating picture necessary to support the evolving global Air Traffic Management (ATM) concepts.

b. Advantages of FIS METI and AI. FIS of METI and AI can augment pilot voice communications with Flight Service Stations (FSS), other air traffic control (ATC) facilities, airline dispatch centers, flight following facilities or other Operation Control Centers (OCC), typically referred to as System Operations Control (SOC). In addition, Internet connectivity provides the capability for Baseline Synchronization Services (BSS) to be utilized to update the aircraft’s navigational and other databases prior to flight.

91-78 AFS-800 Use of Class 1 or Class 2 Electronic Flight Bag (EFB) This advisory circular (AC) provides aircraft owners, operators, and pilots operating aircraft under Title 14 of the Code of Federal Regulations (14 CFR) part 91, with information for removal of paper aeronautical charts and other documentation from the cockpit through the use of either portable or installed cockpit displays (electronic flight bags (EFB). 07-20-2007
91-62A AIR-120 Use of Child Seats in Aircraft Provides information to assist the public in the proper use of child seats aboard aircraft and provides precautions so all occupants are able to exit rapidly from aircraft during emergencies. 10-15-1992
120-87B AFS-200 Use of Child Restraint Systems on Aircraft

This advisory circular (AC) provides information and practices regarding the use of child restraint systems (CRS) on aircraft. We intend for operators to use this as a resource during the development, implementation, and revision of an air carrier’s standard operating procedures (SOP) and training programs regarding the use of CRSs. This AC is one of several Federal Aviation Administration (FAA) initiatives designed to address safety concerns of the National Transportation Safety Board (NTSB). In addition, it is a part of the FAA’s ongoing commitment to educate and inform aircraft operators, crewmembers, and airline passengers regarding the use of CRSs on aircraft in order to encourage and increase the use of approved CRSs. For more information, see the following FAA Web site: http://www.faa.gov/passengers/fly_children/crs/.

21-21 ACE-100 Use of Automobile Gasoline in Agricultural Aircraft

Sets forth acceptable conditions under which automobile gasoline (autogas) may be used in restricted category agricultural aircraft powered by Pratt and Whitney R-985 and R-1340 radial engines, and being used in agricultural operations under Federal Aviation Regulations Part 137.

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. 03-26-1979
91-33A ANE-110 Use of Alternate Grades of Aviation Gasoline for Grade 80/87, and Use of Automotive Gasoline Provides information relating to the use of alternate grades of gasoline when grade 80/87 aviation is not available and the resultant effects of the use of the alternate fuels which have higher TEL (tetraethyl lead) content. Suggestions are offered as acceptable means of avoiding engine operating difficulties when using alternate fuels. This circular also provides suggestions for added safety in the use of automotive gasoline in those aircraft engines and aircraft covered by Supplemental Type Certificates (STCs). 07-18-1984
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
150/5300-15A AAS-100 Use Of Value Engineering For Engineering And Design Of Airport Grant Projects Provides guidance on using value engineering (VE) in airport projects funded under the Federal Aviation Administration's (FAA's) Airport Grant program. 09-30-2008
120-111 AFS-200 Upset Prevention and Recovery Training

This advisory circular (AC) describes the recommended training for airplane Upset Prevention and Recovery Training (UPRT). The goal of this AC is to provide recommended practices and guidance for academic and flight simulation training device (FSTD) training for pilots to prevent developing upset conditions and ensure correct recovery responses to upsets. The AC was created from recommended practices developed by major airplane manufacturers, labor organizations, air carriers, training organizations, simulator manufacturers, and industry representative organizations. This AC provides guidance to Title 14 of the Code of Federal Regulations (14 CFR) part 121 air carriers implementing the regulatory requirements of §§ 121.419, 121.423, 121.424, and 121.427. Although this AC is directed to air carriers to implement part 121 regulations, the FAA encourages all airplane operators, pilot schools, and training centers to implement UPRT and to use this guidance, as applicable to the type of airplane in which training is conducted.

Although a stall is by definition an upset, stall prevention and recovery training is contained in the current edition of AC 120-109, Stall Prevention and Recovery Training.

43-10C AFS-300 United States—Canadian Bilateral Aviation Safety Agreement Maintenance Implementation Procedures

This advisory circular (AC) provides information relating to the Bilateral Aviation Safety Agreement (BASA) and accompanying Maintenance Implementation Procedures (MIP) between the United States and Canada. This AC is not mandatory and does not constitute a regulation. This AC presents recommendations for an acceptable means, but not the only means, to comply with the current revision of the MIP.

00-31A AJW-143 United States (U.S.) National Aviation Standard for the Very High Frequency Omnidirectional Radio Range (VOR)/Distance Measuring Equipment (DME)/Tactical Air Navigation (TACAN) Systems

National Aviation Standard for the Very High Frequency Omnidirectional Radio Range (VOR)/Distance Measuring Equipment (DME)/Tactical Air Navigation (TACAN) Systems






This AC has NO Changes - Database Error noting Change 1

25.807-1 ANM-114 Uniform Distribution of Exits Provides guidance material for acceptable means, but not the only means, of demonstrating compliance with the requirements for distributing required passenger emergency exits uniformly. Addresses only those passenger-carrying airplanes, including mixed passenger/cargo (“combi”) configurations, with a type certification basis for Amendment 25-15 or later with respect to Section 25.807(c) or airplanes with an earlier type certification basis required by Section 25.2 to meet Section 25.807, Amendment 25-15. Does not address airplanes with only one pair of required exits. 08-13-1990
90-95 AFS-800 Unanticipated Right Yaw in Helicopters Examines the unanticipated right yaw phenomenon, the circumstances under which it may be encountered, how it can be prevented, and how the pilot should react if it is encountered. 02-07-1995
103-6 AFS-820 Ultralight Vehicle Operations-Airports, ATC, and Weather Provides guidance for the operation of ultralight vehicles in the U.S. Information includes airport and flight park operations, how to work with ATC, and the availability of weather services. 06-23-1983
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

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