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United States Department of Transportation United States Department of Transportation

Advisory Circulars (ACs)

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Advisory Circulars (ACs) search results
Number Title Status Office Date
61-141 Flight Instructors as Certifying Officials for Student Pilot and Remote Pilot Applicants

This AC assists flight instructors during their review and acceptance of an application for a Student Pilot Certificate or an application for a Remote Pilot Certificate.

Active AFS-800 2018-06-25
20-141B Airworthiness and Operational Approval of Digital Flight Data Recorder Systems with Change 1

This advisory circular (AC) contains changes to Appendix 3. This AC provides information on certification (design and installation) and continued airworthiness of digital flight data recorder systems (DFDRS).

Active AIR-626 2010-08-17
141-1B Part 141 Pilot Schools, Application, Certification, and Compliance

Federal Aviation Administration (FAA)-certificated pilot schools are regulated in accordance with Title 14 of the Code of Federal Regulations (14 CFR) part 141. Unlike pilot training conducted under 14 CFR part 61, part 141 pilot schools are required to use a structured training program and syllabus.

Active AFS-800 2017-09-12
450.141-1A Computing System Safety

This Advisory Circular (AC) provides guidance for identifying computing system safety items, developing safety requirements for each computing system safety item, and mitigating the risks presented by computing system safety items, in accordance with 14 CFR § 450.141. It is intended to provide guidance for an applicant in developing software and computing system safety analyses and processes to comply with § 450.141.

Active AST-1 2021-08-16
91-61 A Hazard in Aerobatics: Effects of G-Forces of Pilots

Provides background information on G-forces, their effect on the human body and their role in safe flying, and offers suggestions for avoiding problems caused by acceleration encountered in aerobatic maneuvers.

Active AFS-800/AAM-500 1984-02-28
00-61 Event Planning Guide

Describes acceptable methods for organizing the aviation community for all events, such as major sports events (auto racing, golf, etc.)

Active AFS-800 2000-07-24
61-139 Institution of Higher Education’s Application for Authority to Certify its Graduates for an Airline Transport Pilot Certificate with Reduced Aeronautical Experience

This advisory circular (AC) provides instructions for institutions of higher education on how to obtain authority to certify students who graduate from the institution’s degree program with an aviation major and otherwise meet the requirements of Title 14 of the Code of Federal Regulations (14 CFR) part 61, § 61.160(b), (c), or (d).

Active AFS-800 2013-07-12
61-142 Sharing Aircraft Operating Expenses in Accordance with 14 CFR § 61.113 (c)

This AC provides guidance on how a pilot may share flight expences with passengers in a manner consistent with Title 14 of the Code of Federal Regulation (14 CFR).

Active AFS-800 2020-02-25
61-144 Issuance Process for Pilot Certificates in Accordance with the Implementation Procedures for Licensing as Part of the Bilateral Aviation Safety Agreement Between the FAA and the Swiss FOCA

It also contains information on whom to contact and where to find the process for the conversion of an FAA pilot certificate to a CH Part-FCL pilot license. This AC also describes how the conversion process is different from the process for obtaining an FAA pilot certificate issued on the basis of a foreign pilot license under Title 14 of the Code of Federal Regulations (14 CFR) part 61, § 61.75 and for which the FAA pilot certificate is limited by the foreign pilot license.

Active AFS-800 2024-04-10
61-146 Pilot Certification and Operations for Sport Pilots, Flight Instructors with a Sport Pilot Rating, and Simplified Flight Controls

This advisory circular (AC) provides guidance on the changes to Title 14 of the Code of Federal Regulations (14 CFR) part 61 concerning sport pilot certification, training, and operations in accordance with the Modernization of Special Airworthiness Certification (MOSAIC) final rule regulatory amendments.

Active AFS-800/200 2025-11-14
61-134 General Aviation Controlled Flight into Terrain Awareness

Highlights the inherent risk that controlled flight into terrain (CFIT) poses for general aviation (GA) pilots.

Active AFS-800 2003-04-01
61-143 Conversion Process for Pilot Certificates in Accordance with the Technical Implementation Procedures - Licensing as Part of the Bilateral Aviation Safety Agreement Between the FAA and EASA including Change 1

It also contains information on whom to contact and where to find the process for converting an FAA pilot certificate to an EU Part-FCL pilot license. This AC describes how this conversion process is different from the process for obtaining an FAA pilot certificate issued on the basis of a foreign pilot license under Title 14 of the Code of Federal Regulations (14 CFR) part 61, § 61.75 and for which the FAA certificate is limited by the foreign license.

Active AFS-800 2021-06-22
61-145 Flight Instructor Enhanced Qualification Training Program (FIEQTP)

This AC also contains guidance that is pertinent to 14 CFR parts 1, 60, 61, 141, and 142.

Active AFS-800 2024-10-30
61-107B Aircraft Operations at Altitudes Above 25,000 Feet Mean Sea Level or Mach Numbers Greater Than .75/ with Change 1

In particular, this AC stresses special physiological, equipment, and aerodynamic considerations involved in these kinds of operations.

Active AFS-800 2013-03-29
61-136B FAA Approval of Aviation Training Devices and Their Use for Training and Experience

This AC contains specific procedures regarding the evaluation, approval, and use of an ATD under 14 CFR parts 61 and 141.

Active AFS-800 2018-09-12
61-135A Conversion Process for Pilot Certificates in Accordance with the Implementation Procedures for Licensing as part of the Bilateral Aviation Safety Agreement Between the Federal Aviation Administration and Transport Canada Civil Aviation Authority for Pilot Licensing including Change 1

This advisory circular (AC) provides the procedure and eligibility requirements for a Transport Canada Civil Aviation Authority (TCCA) pilot license holder converting to an Federal Aviation Administration (FAA) pilot certificate and an outline of the procedures and eligiblity requirments for an FAA pilot certificate holder converting to a TCCA pilot license.

Active AFS-800 2015-05-15
61-140A Autorotation Training

This information is intended to supplement information about autorotation training found in the current editions of the Helicopter Flying Handbook (HFH), FAA-H-8083-21, and the Helicopter Instructor’s Handbook (HIH), FAA-H-8083-4. This AC is not mandatory and does not constitute a regulation. This AC describes an acceptable means, but not the only means, of conducting autorotation training for proficiency or in consideration of the requirements to be issued an Airman Certificate under Title 14 of the Code of Federal Regulations (14 CFR) part 61.

Active AFS-800 2016-08-31
61-138A Airline Transport Pilot Certification Training Program including Change 1

This AC provides information and courseware guidelines to authorized providers to aid in the development of a training program which meets the requirements of Title 14 of the Code of Federal Regulations (14 CFR) part 61, § 61.156.

Active AFS-800 2023-06-21
61-65K Certification: Pilots and Flight and Ground Instructors

This advisory circular (AC) provides guidance for pilot and instructor applicants, pilots, flight instructors, ground instructors, and examiners on the certification standards, knowledge test procedures, and other requirements in Title 14 of the Code of Federal Regulations (14 CFR) part 61.

Active AFS-800 2025-11-14
120-61B In-flight Radiation Exposure

This advisory circular (AC) provides basic background information and links to sources of more detailed information that can be used to improve air carrier programs that inform crewmembers about in-flight ionizing radiation exposure.

Active AFS-200 2014-11-21
61-67C Stall and Spin Awareness Training with Change 1 & 2

This advisory circular (AC) explains the stall and spin awareness training required under Title 14 of the Code of Federal Regulations (14 CFR) part 61 and offers guidance to flight instructors who provide that training.

Active AFS-840 2000-09-25
61-137B Approval of Manufacturer's Required Training Programs

This advisory circular (AC) provides information to organizations providing training in aircraft that contain a training requirement in the limitations section of the Airplane Flight Manual (Aircraft Flight Manual (AFM), Rotorcraft Flight Manual (RFM), etc.).

Active AFS-800 2014-10-31
61-98E Currency Requirements and Guidance for the Flight Review and Instrument Proficiency Check

This AC provides information to assist General Aviation (GA) pilots, flight instructors, and ground instructors in complying with the flight reviews required by Title 14 of the Code of Federal Regulations (14 CFR) part 61, § 61.56 and the instrument proficiency check (IPC)/recent flight experience requirements of § 61.57.

Active AFS-800 2024-10-30
61-83K Nationally Scheduled, FAA-Approved, Industry-Conducted Flight Instructor Refresher Course

This AC provides guidance and recommendations for the preparation and approval of training course outlines (TCO) for Federal Aviation Administration (FAA)-approved, industry-conducted flight instructor refresher courses (FIRC) in accordance with Title 14 of the Code of Federal Regulations (14 CFR) part 61, § 61.197(b)(2)(iii).

Active AFS-800 2024-10-30
61-91K WINGS—Pilot Proficiency Program

The objective of the WINGS—Pilot Proficiency Program is to reduce the number of accidents in General Aviation (GA) by assisting pilots to find educational opportunities designed to help them apply the principles of risk assessment and risk management (RM).

Active AFS-800 2024-10-30
60-28B FAA English Language Standard for an FAA Certificate Issued Under 14 CFR Parts 61, 63, 65, and 107

This advisory circular (AC) introduces the Federal Aviation Administration (FAA) Aviation English Language Standard (AELS) and provides guidance to applicants, airmen, training organizations, Designated Examiners (DE), and flight and ground instructors on how to determine that an applicant for an FAA certificate or a person holding an FAA certificate meets the FAA AELS.

Active AFS-800 2017-06-02
91-67A Minimum Equipment Requirements for General Aviation Operations Under 14 CFR Part 91, § 91.213

This AC describes acceptable ways in which an aircraft can be operated under Title 14 of the Code of Federal Regulations (14 CFR) part 91, 133, or 137 (including part 91 operations conducted by parts 141 and 142 certificate holders (CH)) with certain inoperative instruments and equipment items that are not essential for safe operations, in accordance with part 91, § 91.213.

Active AFS-800 2023-10-16
20-178 Flammability Testing of Aircraft Cabin Interior Panels After Alterations

This AC applies to materials for self-extinguishing flammability only. This AC does not apply to materials that must meet heat release or smoke emissions,standards established by Title 14 of the Code of Federal Regulations (14 CFR) part 25, Amendment 25-61, and 14 CFR part 121, Amendment 121-289.

Active AIR-100 2012-06-04