Skip to page content

USA Banner

Official US Government Icon

Official websites use .gov
A .gov website belongs to an official government organization in the United States.

Secure Site Icon

Secure .gov websites use HTTPS
A lock ( ) or https:// means you’ve safely connected to the .gov website. Share sensitive information only on official, secure websites.

United States Department of Transportation United States Department of Transportation

Advisory Circulars (ACs)

Search Results

Number, title, description, or office

Advisory Circulars (ACs) search results
Number Title Status Office Date
21-40A Guide for Obtaining a Supplemental Type Certificate

Intended as a certification guide and checklist for obtaining a Supplemental Type Certificate (STC).

Active AIR-600 2007-09-27
29-2C Certification of Transport Category Rotorcraft (Changes 1 - 9 incorporated)

a. This revision makes needed changes to this Advisory Circular (AC).
b. The change number and the date of the changed material are shown at the top of each page.

Active AIR-600 2008-09-30
33-9 Developing Data for Major Repairs of Turbine Engine Parts

a. This advisory circular (AC) provides information and guidance on developing the technical data needed for major repairs of critical and complex turbine engine parts.

Active AIR-600 2010-04-30
33.70-1 Guidance Material for Aircraft Engine Life-Limited Parts Requirements

This advisory circular (AC) provides definitions, guidance, and acceptable methods, but not the only methods, that may be used to demonstrate compliance with the engine life-limited parts integrity requirements of § 33.70 of Title 14 of the Code of Federal Regulations (14 CFR part 33).

Active AIR-600 2009-07-31
27-1B Certification of Normal Category Rotorcraft (Changes 1 - 9 incorporated)

a.This revision makes needed changes to this Advisory Circular (AC).
b.The change number and the date of the changed material are shown at the top of each page.

Active AIR-600 2008-09-30
00-72 Best Practices for Airborne Electronic Hardware Design Assurance Using EUROCAE ED-80( ) and RTCA DO-254( )

This advisory circular (AC) provides “best practices” for airborne electronic hardware (AEH) design assurance and, is intended to be complementary information to EUROCAE ED-80, Design Assurance Guidance for Airborne Electronic Hardware, RTCA DO-254, Design Assurance Guidance for Airborne Electronic Hardware, and AC 20-152A, Development Assurance for Airborne Electronic Hardware.

Active AIR-600 2022-10-07
20-146A Methodology for Dynamic Seat Certification by Analysis for Use in Parts 23, 25, 27, and 29 Airplanes and Rotorcraft

This advisory circular (AC) sets forth an acceptable means, but not the only means, for demonstrating compliance with title 14 of the Code of Federal Regulations (14 CFR)
§§ 23.562, 25.562, 27.562, and 29.562, as well as Technical Standard Order (TSO) TSO-C127a, and TSO-C127b.

Active AIR-600 2018-06-29
20-53C Protection of Aircraft Fuel Systems Against Vapor Ignition Caused by Lightning

This advisory circular (AC) provides applicants with guidance for obtaining Federal Aviation Administration (FAA) approval of compliance pursuant to title 14, Code of Federal Regulations (14 CFR) 23.954, 27.954, and 29.954, Fuel system lightning protection.

Active AIR-600 2018-09-24
00-74 Avionics Human Factors Considerations for Design and Evaluation

This advisory circular (AC) identifies two reports that provide information in the form of “recommended practices” to increase awareness of human factors and facilitate the identification and resolution of human factors/pilot interface issues during the design and evaluation of avionics.

Active AIR-600 2019-05-01
25.353-1 Rudder Control Reversal Conditions

This AC describes acceptable means for showing compliance with the requirements of Title 14, Code of Federal Regulations (14 CFR) 25.353, Rudder control reversal conditions, at amendment 25-147.

Active AIR-600 2022-11-28
20-152A Development Assurance for Airborne Electronic Hardware

This advisory circular (AC) describes an acceptable means, but not the only means, for showing compliance with the applicable airworthiness regulations for the electronic hardware aspects of airborne systems and equipment for type certification or Technical Standard Order (TSO) authorization.

Active AIR-600 2022-10-07
20-135 Powerplant Installation and Propulsion System Component Fire Protection Test Methods, Standards and Criteria with change 1

Provides guidance for use in demonstrating compliance with the powerplant fire protection requirements of the Federal Aviation Regulations (FAR).

Active AIR-600 1990-02-06
33.70-2 Damage Tolerance of Hole Features in High-Energy Turbine

This advisory circular (AC) provides definitions, guidance, and acceptable methods, but not the only methods, that may be used to demonstrate compliance with requirements in § 33.70 of Title 14 of the Code of Federal Regulations related to the integrity of engine life-limited parts.

Active AIR-600 2009-08-28
20-189 Management of Open Problem Reports (OPRs)

This advisory circular (AC) describes an acceptable means for showing compliance with the applicable airworthiness regulations for the management of open problem reports (OPRs) in technical standard order (TSO) authorization and type certification for the system, software, and airborne electronic hardware (AEH) domains.This document contains guidance that is not legally binding in its own right nor will be relied upon by the Department of Transportation or the Federal Aviation Administrationas a separate basis for affirmative enforcement action or other administrative penalty.

Active AIR-600 2022-09-16
00-71 Best Practices for Management of Open Problem Reports (OPRs)

This advisory circular (AC) provides “best practices” for the management of open problem reports, and is intended to complement AC 20-189, Management of Open Problem Reports (OPRs).

Active AIR-600 2022-09-16
20-144A FAA Approval of Electrical Firing Cartridge Components in an Aircraft Fire Extinguishing or Suppression System

This advisory circular (AC) provides acceptable means for showing compliance with the requirements of title 14, Code of Federal Regulations (14 CFR) 23.1301, amendment 23-62 or earlier, 25.1301, 27.1301, and 29.1301 (herein, collectively, 2X.1301), Function and installation, with regard to fire extinguishing or suppression systems that contain electrical firing cartridge components.

Active AIR-600 2018-10-11
20-190 Aircraft Electromagnetic Compatibility Certification

This advisory circular (AC) identifies SAE Aerospace Recommended Practices (ARP) 60493, Guide to Civil Aircraft electromagnetic Compatibility (EMC), dated October 25, 2017, and European Organization For Civil Aviation Equipment (EUROCAE) ED-248, Guide to Civil Aircraft Electromagnetic Compatibility (EMC), dated January 22, 2018 as recommended practices for showing compliance pursuant to the following Title 14, Code of Federal Regulations (14 CFR):

  • § 23.2500
  • §§ 25.1309(a), 25.1309(e), 25.1353(a), and 25.1431(c)
  • §§ 27.1309(a), and Part 27 Appendix B
  • §§ 29.1309(a), 29.1309(g), 29.1353(a), and 29.1431(b)

Active AIR-600 2018-06-25
35-1A Certification of Propellers

This advisory circular (AC) provides guidance and describes acceptable methods, but not the only methods, that may be used to demonstrate compliance with provisions of the requirements of part 35 of Title 14 of the Code of Federal Regulations (14 CFR part 35).

Active AIR-600 2018-10-11
89-2 Declaration of Compliance Process for Remote Identification of Unmanned Aircraft Active AIR-600 2020-12-22
21-29D Detecting and Reporting Suspected Unapproved Parts

This advisory circular (AC) provides guidance to the aviation community for detecting suspected unapproved parts (SUP) and reporting them to the Federal Aviation Administration (FAA).

Active AIR-600 2016-07-12
25-7D Flight Test Guide for Certification of Transport Category Airplanes

This advisory circular (AC) provides guidance for the flight test evaluation of transport category airplanes.

Active AIR-600 2018-05-04
25.954-1 Transport Airplane Fuel System Lightning Protection

This advisory circular (AC) provides guidance for showing compliance with the airworthiness regulations for transport category airplanes regarding lightning protection of fuel tanks and systems.

Active AIR-600 2018-09-24
20-185A Airworthiness Approval of Synthetic Vision Systems, Synthetic Vision Guidance Systems and Aircraft State Awareness Synthetic Vision Systems

The Federal Aviation Administration (FAA) has consolidated all synthetic vision related guidance into this advisory circular (AC).

Active AIR-600 2021-01-27
25.981-1D Fuel Tank Ignition Source Prevention Guidelines

This AC provides guidance for showing compliance with § 25.981, which provides the certification requirements for the prevention of ignition sources, other than lightning, within the fuel tanks of transport category airplanes.

Active AIR-600 2018-09-24
20-162B Airworthiness Approval of Installed Radio Frequency Identification (RFID) Tags and Sensors

This advisory circular (AC) provides certification applicants with airworthiness guidance for installing passive, battery-assisted passive (BAP), and active radio frequency identification (RFID) tags and sensors on aviation products and equipment.

Active AIR-600 2018-10-11
25.795-10 Installation of Physical Secondary Barriers for Transport Category Airplanes

This advisory circular (AC) provides an acceptable means of showing compliance with the requirements of § 25.795(a)(4).

Active AIR-600 2023-06-27
89-1 Means of Compliance Process for Remote Identification of Unmanned Aircraft Active AIR-600 2020-12-22