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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
43-213A Parts Marking Identification - Including Change 1

This advisory circular (AC) provides information and guidance on developing procedures for part marking and part re-marking when performing maintenance, alteration, and fabrication, including the fabrication of owner- or operator-produced parts.

Active AFS-300 2013-05-14
43-214A Repairs and Alterations to Composite and Bonded Aircraft Structure

-registered airplanes), 133, 135, 137, and 145 regarding procedures and facilities for repairs and alterations of structures consisting of adhesively-bonded (including metal bond) and fiber-reinforced materials (e.g., carbon, aramid, and glass-reinforced polymeric materials mentioned in the current edition of AC 20-107, Composite Aircraft Structure).

Active AFS-300 2016-07-23
43-6D Altitude Reporting Equipment and Transponder System Maintenance and Inspection Practices

Like all advisory material, this AC is not in itself mandatory and does not constitute a regulation. It provides a means, but not the only means, of testing at the time of original installation, after performing repairs, or during scheduled recertification.

Active AFS-300 2017-02-15
120-79A Developing and Implementing an Air Carrier Continuing Analysis and Surveillance System

This advisory circular (AC) provides information for developing and implementing a Continuing Analysis and Surveillance System (CASS).

Active AFS-300 2010-09-07
145-9A Guide for Developing and Evaluating Repair Station and Quality Control Manuals

This advisory circular (AC) provides informational material for all repair station certificate holders and/or applicants under Title 14 of the Code of Federal Regulations (14 CFR) part 145 to develop and evaluate a Repair Station Manual (RSM) and Quality Control Manual (QCM).

Active AFS-300 2017-10-06
91-44A Operational and Maintenance Practices for Emergency Locator Transmitters and Receivers - Change 1

Combines and updates material in several Advisory Circulars on the subject of emergency locator transmitters (ELT) receivers for airborne service.

Active AFS-300 1980-12-12
00-34B Aircraft Ground Handling, Servicing, and Marshalling

This AC contains information and guidance for servicing, ground handling, and marshalling an aircraft.

Active AFS-300 2024-07-17
00-65A Towbar and Towbarless Movement of Aircraft

This AC provides guidance for towbar and towbarless movement of aircraft and applies to all operators under Title 14 of the Code of Federal Regulations (14 CFR) parts 91, 91 subpart K (part 91K), 121, 125, 129, and 135.

Active AFS-300 2023-08-11
65-2D Airframe and Powerplant Mechanics Certification Guide Active AFS-300 1987-01-30
20-142 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.

Active AFS-300 2000-02-25
43.13-1B Acceptable Methods, Techniques, and Practices - Aircraft Inspection and Repair [Large AC. This includes Change 1.]

The repair data may also be used as approved data, and the AC chapter, page, and paragraph listed in block 8 of FAA form 337 when:

a.

Active AFS-300 1998-09-08
120-106B Scope and Recommended Content for an Airworthiness Agreement Between a Certificate Holder and a Maintenance Provider

This AC outlines the scope and recommended content for airworthiness agreements between a certificate holder (CH)
and its contract maintenance providers (CMP).

Active AFS-300 2024-06-18
43.13-2B Acceptable Methods, Techniques, and Practices - Aircraft Alterations Active AFS-300 2008-03-03
120-78B Electronic Signatures, Electronic Recordkeeping, and Electronic Manuals

This advisory circular (AC) provides standards and guidance for electronic signatures, electronic recordkeeping, and electronic manual systems.

Active AFS-300 2024-12-11
90-89C Amateur-Built Aircraft and Ultralight Flight Testing Handbook

This AC provides suggestions and safety-related recommendations primarily to assist amateur-built aircraft and ultralight vehicle builders in developing individualized flight test plans.

Active AFS-300 2023-02-14
65-31B Training, Qualification, and Certification of Nondestructive Inspection Personnel

This advisory circular (AC) contains recommendations for the experience, training, qualification, examination, and certification of nondestructive inspection (NDI) personnel for the inspection of aircraft, engines, propellers, accessories, and other aviation components.

Active AFS-300 2014-02-24
147-3C Certification and Operation of Aviation Maintenance Technician Schools

Conformity with the guidance is voluntary only and nonconformity will not affect rights and obligations under existing statutes and regulations.

Active AFS-300 2022-03-22
20-97B Aircraft Tire Maintenance and Operational Practices with Change 1

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.

Active AFS-300 2005-04-18
20-186A Airworthiness and Operational Approval of Cockpit Voice Recorder Systems

Specifically, when followed in its entirety, it provides an acceptable means for complying with the airworthiness regulations contained in Title 14 of the Code of Federal Regulations (14 CFR) parts 23, 25, 27, 29, 91, 121, 125, 129, and 135 when installing CVR systems in airplanes and rotorcraft. As CVR systems and technology advance, applicants are encouraged to propose alternative methods to their responsible Aircraft Certification Service office to integrate new and novel safety enhancing CVR systems and functions into their aircraft.

Active AFS-300 2024-05-06
20-105C Reciprocating Engine Power-Loss Accident Prevention and Trend Monitoring

The contents of this document do not have the force and effect of law and are not meant to bind the public in any way, and the document is intended only to provide information to the public regarding existing requirements under the law or agency policies.

Active AFS-300 2023-12-18
145-4A Inspection, Retread, Repair, and Alterations of Aircraft Tires - Including Change 2

This AC describes methods the Administrator accepts per Title 14 of the Code of Federal Regulations (14 CFR) parts 21, 23, 25, 27, 29, 43, and 145 for the development, qualification, and approval of bias and radial aircraft tire retreads, their repair and process specifications, and the use of special nondestructive inspection (NDI) techniques.

Active AFS-300 2006-07-10
91-59A Inspection and Care of General Aviation Aircraft Exhaust Systems - Change 1

This advisory circular (AC) emphasizes the safety hazards of poorly maintained aircraft exhaust systems (reciprocating powerplants) and highlights points at which exhaust system failures occur. Further, it provides information on the types of problems to expect and recommends that pilots perform ongoing preventive maintenance and that mechanics perform maintenance.

Active AFS-300 2007-07-23
65-33A Development of Training/Qualification and Certification Programs for Composite Maintenance Technicians

This advisory circular (AC) is intended as a guideline for repair organizations to develop a formal training program for qualification and certification of composite technicians that they employ. This AC contains recommendations for the experience, training, qualification, and examination of persons performing maintenance and repair of aircraft composite structures or other aviation composite components.

Active AFS-300 2017-06-27
20-154A Guide for Developing a Receiving Inspection System for Aircraft Parts and Materials

Like all AC material, this AC is not mandatory and does not constitute a regulation. It provides guidance and outlines a method of compliance with 14 CFR.

Active AFS-300 2024-07-03
43-206 Inspection, Prevention, Control, and Repair of Corrosion on Avionics Equipment Including Change 1

AC contains acceptable methods, techniques, and practices for inspection, prevention, control and repair of corrosion on avionic systems and equipment.

Active AFS-300 2001-05-30
145-11A Repair Station Guidance for Compliance with the Safety Agreement between the United States and the European Union

This advisory circular (AC) provides information and guidance regarding a repair station located in the United States obtaining, renewing, or amending a European Aviation Safety Agency (EASA) Part-145 approval and an Approved Maintenance Organization (AMO) located within the European Union (EU) obtaining, renewing, or amending a Federal Aviation Administration (FAA) repair station certificate under the provisions of the U.S.

Active AFS-300 2012-11-28
43-210A Standardized Procedures for Obtaining Approval of Data Used in the Performance of Major Repairs and Major Alterations - Change 1

This AC also provides information that can help determine if a proposed repair/alteration requires approved data, guidance and standardized procedures for obtaining field approval (or approval by other means) of data, and instructions for completing the field approval checklist.

Active AFS-300 2016-08-17
20-62E 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.

Active AFS-300 2018-09-14
20-109B Service Difficulty Reporting System (Air Operator/Air Agency/General Aviation/Unmanned Aircraft Systems)

This AC describes methods the Administrator prescribes per Title 14 of the Code of Federal Regulations (14 CFR) part 91, § 91.1415; part 125, § 125.409; and part 135, § 135.415; and accepts per part 121, § 121.703 and part 145, § 145.221 for reporting in-service product and article failures, malfunctions, and defects.

Active AFS-300 2023-11-01
20-77B Use of Manufacturers’ Maintenance Manuals

This advisory circular (AC) informs owners and operators about the usefulness of manufacturer’s maintenance manuals for servicing, repairing, and maintaining aircraft, engines, and propellers.

Active AFS-300 2016-01-04
135-10C Approved Aircraft Inspection Program including Change 1

The contents of this document do not have the force and effect of law and are not meant to bind the public in any way, and the document is intended only to provide information to the public regarding existing requirements under the law or agency policies.

Active AFS-300 2023-05-23
120-124 Continuous Airworthiness Maintenance Program (CAMP) Training Program

This AC explains the scope and detail the Federal Aviation Administration (FAA) expects of a Continuous Airworthiness Maintenance Program (CAMP) Training Program and offers a means (but not the only means) of compliance with Title 14 of the Code of Federal Regulations (14 CFR) part 91, § 91.1433; part 121, § 121.375; and part 135, § 135.433, the regulations requiring maintenance and preventive maintenance training programs.

Active AFS-300 2023-10-24
91-55A Reduction of Electrical System Failures Following Aircraft Engine Starting

The contents of this document do not have the force and effect of law and are not meant to bind the public in any way, and the document is intended only to provide information to the public regarding existing requirements under the law or agency policies.

Active AFS-300 2023-10-11
39-7D Airworthiness Directives

This advisory circular (AC) provides guidance and information to owners and operators of aircraft concerning their responsibility for complying with Airworthiness Directives (AD) and recording AD compliance in the appropriate maintenance records.

Active AFS-300 2012-03-02
65-30B Overview of the Aviation Maintenance Profession with Change 1

The contents of this document do not have the force and effect of law and are not meant to bind the public in any way, and the document is intended only to provide information to the public regarding existing requirements under the law or agency policies.

Active AFS-300 2023-05-23
120-115 Maintainer Fatigue Risk Management

Describes the basic concepts of human fatigue and how it relates to safety for aviation maintenance organizations and individual maintainers.

Active AFS-300 2016-12-02
43-218 Operational Authorization of Integrated Aircraft Health Management System

Conformity with the guidance is voluntary only and nonconformity will not affect rights and obligations under existing statutes and regulations.

Active AFS-300 2022-07-08
65-23B Certification of a Repairman (Experimental Aircraft Builders)

The contents of this document do not have the force and effect of law and are not meant to bind the public in any way, and the document is intended only to provide information to the public regarding existing requirements under the law or agency policies.

Active AFS-300 2024-09-27
120-97A Incorporation of Fuel Tank System Instructions for Continued Airworthiness into Operator Maintenance or Inspection Programs (Including Change 1)

On May 7, 2001, the Transport Airplane Fuel Tank System Design Review, Flammability Reduction and Maintenance and Inspection Requirements final rule was published in the Federal Register (FR).

Active AFS-300 2012-05-25
43-208 Maintenance of Emergency Evacuations Systems for Aircraft Operating Under Part 121

Additionally, this AC discusses the responsibilities and means of compliance for the air carrier and persons performing maintenance.

Active AFS-300 2003-04-04
65-32A Certification of Repairmen (Light-Sport Aircraft)

This advisory circular (AC) provides the public with information regarding the certification of repairmen (light-sport aircraft (LSA)) with maintenance and inspection ratings, the acceptability of training courses, and the continued airworthiness of LSA.

Active AFS-300 2013-02-08
119-2A Operational Use of Radio Frequency Identification Systems Onboard Aircraft

This AC provides aircraft operator guidance on the use of radio frequency identification (RFID) devices and systems in operational and maintenance environments as a means of identifying or scheduling specific maintenance and inspection tasks in accordance with Title 14 of the Code of Federal Regulations (14 CFR) parts 43, 91, 121, 125, 129, and 135.

Active AFS-300 2021-08-23
43-217 Anticollision Light Maintenance (ACLM)

These locations tend to place the lights in extreme environmental conditions and subject to lightning strike and ground damage.

Active AFS-300 2018-12-12
91.21-1D Use of Portable Electronic Devices Aboard Aircraft

This AC provides aircraft owners, operators (i.e., certificate holders), and the flying public with information and guidance to comply with Title 14 of the Code of Federal Regulations (14 CFR) part 91, §91.21.

Active AFS-300 2017-10-27
43-209A Recommended Inspection Procedures for Former Military Aircraft

This advisory circular (AC) is for the development of inspection program requirements for the certification of former military aircraft in the experimental category for the purpose(s) of exhibition and air racing that operate in the United States in accordance with Title 14 of the Federal Code of Regulations (14 CFR) part 21, § 21.191(d) and (e).

Active AFS-300 2013-04-12
00-64 Air Medical Resource Management

This AC provides guidance and information, which establish minimum guidelines for Air Medical Resource Management Training.

Active AFS-300 2005-09-22
120-77A Performance Rules: Provisions Contained in an Operator Manual Under § 43.13(c)

The contents of this document do not have the force and effect of law and are not meant to bind the public in any way, and the document is intended only to provide information to the public regarding existing requirements under the law or agency policies.

Active AFS-300 2023-10-24
43-4B Corrosion Control for Aircraft

This AC provides guidance to aircraft operators and maintenance, repair, and overhaul (MRO) organizations for the development of a corrosion control program.

Active AFS-300 2018-09-11
43.9-1G Instructions for Completion of FAA Form 337

This AC provides instructions for completing Federal Aviation Administration (FAA) Form 337, Major Repair and Alteration (Airframe, Powerplant, Propeller, or Appliance).

Active AFS-300 2019-11-01
91-90 Part 91 Approved Inspection Programs

This advisory circular (AC) prescribes the procedures to develop and submit aircraft owner- and operator-specific inspection programs in accordance with an inspection program selected under the provisions of Title 14 of the Code of Federal Regulations (14 CFR) part 91, § 91.409(f)(4), and satisfies the requirements of § 91.409(g) for review and approval by the Federal Aviation Administration (FAA).

Active AFS-300 2017-04-05
00-56B Voluntary Industry Distributor Accreditation Program with Change 1

The contents of this document do not have the force and effect of law and are not meant to bind the public in any way, and the document is intended only to provide information to the public regarding existing requirements under the law or agency policies.

Active AFS-300 2015-05-27
120-102B Incorporation of Electrical Wiring Interconnection Systems Instructions for Continued Airworthiness into an Operator’s Maintenance Program

This AC is not mandatory and does not constitute a regulation. This AC describes an acceptable means, but not the only means, for Title 14 of the Code of Federal Regulations (14 CFR) part 121 certificate holders (CH) and part 129 operators (part 129, § 129.14) of U.S.

Active AFS-300 2024-06-03
43-10C 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.

Active AFS-300 2011-04-23
43-18 Fabrication of Aircraft parts by Maintenance Personnel

This AC provides one means of complying with the requirements of Title 14 of the Code of Federal Regulations (14 CFR) parts 21 and 43 for the design and fabrication of parts by persons performing maintenance and alterations using methods, techniques, and practices acceptable to the Administrator.

Active AFS-300 2006-03-24
25-29 Development of a Nondestructive Inspection Program/Organization

This advisory circular (AC) provides guidance for the development of organizations and facilities performing nondestructive inspections (NDI). This material is neither mandatory nor regulatory in nature and does not constitute a regulation.

Active AFS-300 2013-09-20
120-17B Reliability Program Methods—Standards for Determining Time Limitations

When accepted by the Federal Aviation Administration (FAA) and after receiving authorization for its use by operations specifications (OpSpecs), your reliability program gives you the authority and the means to adjust your maintenance schedule tasks and intervals without prior approval or acceptance by the FAA.

Active AFS-300 2018-12-19
120-72A Maintenance Human Factors Training

1.Provides descriptions of references and training materials to ensure that thereader can assemble a Maintenance Human Factors (MxHF) training programmatched to the applicable needs of their specific organization. 2.Provides many sources of current information to develop, implement,reinforce, and assess MxHF training materials. 3.Streamlines MxHF training development at the local level. 4.Is not mandatory, like any AC, and does not constitute a regulation

Active AFS-300 2017-04-11
120-113 Best Practices for Engine Time In Service Interval Extensions - Change 1

The AC explains the background of engine time in service intervals as well as the Federal Aviation Administration’s (FAA) regulatory requirements for time limitations and time in service intervals for engine overhauls. The AC also provides aircraft operators with information on the best practices for an engine time in service interval extension program and how to obtain an engine time in service interval extension.

Active AFS-300 2016-01-06
136-2 Recommended Aircraft Maintenance Practices for Commercial Air Tour Operators - Change 1 Included

The recommended practices in this AC aren’t mandatory and don’t constitute a regulation. However, we believe that when properly followed, these practices can increase safety in your operation and reduce the number of maintenance-related air tour accidents.

Active AFS-300 2014-01-22
8260-32F United States Air Force Terminal Instrument Procedures Service

This order provides guidance to all personnel in the administration of the Flight Procedures and Airspace Program. It defines responsibilities regarding terminal instrument procedure development and maintenance service provided by the FAA for the USAF at domestic civil airports under Department of Transportation (DOT), FAA, Department of Defense (DoD), and USAF Memorandum of Agreement effective July 7, 1978.

Active AFS-300 2018-12-14
43-216A Software Management During Aircraft Maintenance

The contents of this document do not have the force and effect of law and are not meant to bind the public in any way, and the document is intended only to provide information to the public regarding existing requirements under the law or agency policies.

Active AFS-300 2023-08-25
65-25F William (Bill) O’Brien Aviation Maintenance Technician Awards Program

This revision addresses changes to the Awards Program Awards Program and provides instructions for AMTs and the employers of AMTs participating in the online Awards Program.

Active AFS-300 2016-08-18
135-44 Part 135 Operator Aircraft Configuration Inspection

This AC provides information concerning the placement of aircraft into service for Title 14 of the Code of Federal Regulations (14 CFR) part 135 commuter and on demand operations. This AC is not mandatory and does not constitute a regulation.

Active AFS-300 2018-09-25
91-91 Maintaining Public Aircraft

The AC describes methods for maintaining aircraft in order to maximize both a safety and economic benefit.

Active AFS-300 2016-10-19
145-10 Repair Station Training Program w/ Change 1

Provides information on developing the repair station employee training program required under 14 of the Code of Federal Regulations (14 CFR) part 145, section 145, 163, categories of training, training program components, and sample training programs.

Active AFS-300 2005-07-08
120-16G Air Carrier Maintenance Programs

Our explanation describes the scope and content of air carrier aircraft maintenance programs. This is important as there is a significant difference between an air carrier maintenance program and an inspection program used in non-air carrier maintenance operations.

Active AFS-300 2016-01-04
135-7B Part 135: Additional Maintenance Requirements for Aircraft Type Certificated for Nine or Less Passenger Seats

This AC gives part 135 certificate holders an acceptable means to comply with the regulations; however, it is not the only means. This AC is not mandatory and does not constitute a regulation. When this AC uses mandatory language (e.g., “must” or “may not”) it is paraphrasing a regulatory requirement or prohibition.

Active AFS-300 2016-08-11
120-98A Operator Information for Incorporating Fuel Tank Flammability Reduction Requirements into a Maintenance or Inspection Program (Including Change 1)

While these guidelines are not mandatory, they are derived from extensive FAA and industry experience in determining compliance with the relevant regulations.

Active AFS-300 2012-06-22
43-215 Standardized Procedures for Performing Aircraft Magnetic Compass Calibration

These procedures are often referred to as “swinging the compass” or a “compass swing.” This AC is not mandatory and does not constitute a regulation. These means are not the only means to perform aircraft compass calibration.

Active AFS-300 2017-08-07
43-211A Recommended Alternative Inspection Schedule for Daher (Socata) TBM Series Aircraft

This advisory circular (AC) recommends an inspection schedule for owners of Daher (Socata) TBM Series aircraft. If aircraft owners/operators and maintenance providersinspect aircraft under a progressive inspection program, this AC will help ensure they comply with Title 14 of the Code of Federal Regulations (14 CFR) part 91, § 91.409.

Active AFS-300 2016-01-29