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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
20-97B Aircraft Tire Maintenance and Operational Practices with Change 1

This advisory circular (AC) provides recommended tire care and maintenance practices needed to assure the safety of support personnel and the continued airworthiness of aircraft.

Active AFS-300 2005-04-18
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
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
65-2D Airframe and Powerplant Mechanics Certification Guide Active AFS-300 1987-01-30
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.

Active AFS-300 2007-07-23
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
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
00-56B Voluntary Industry Distributor Accreditation Program with Change 1

This AC describes a system for accrediting civil aircraft parts distributors based on voluntary industry oversight.

Active AFS-300 2015-05-27
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.

Active AFS-300 2016-01-29
65-25F William (Bill) O’Brien Aviation Maintenance Technician Awards Program

This advisory circular (AC) outlines the participation requirements for the FederalAviation Administration (FAA) William (Bill) O’Brien Aviation Maintenance Technician (AMT) Awards Program.

Active AFS-300 2016-08-18
147-3C Certification and Operation of Aviation Maintenance Technician Schools

This AC provides guidance to assist persons in obtaining and maintaining Federal Aviation Administration (FAA) certification of an Aviation Maintenance Technician School (AMTS).

Active AFS-300 2022-03-22
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
20-186A Airworthiness and Operational Approval of Cockpit Voice Recorder Systems

This advisory circular (AC) provides guidance for gaining airworthiness approval for cockpit voice recorder (CVR) systems.

Active AFS-300 2024-05-06
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
43-214A Repairs and Alterations to Composite and Bonded Aircraft Structure

This advisory circular (AC) provides information and guidance concerning an acceptable means, but not the only means, of demonstrating compliance with the requirements of Title 14 of the Code of Federal Regulations (14 CFR) parts 21, 23, 25, 26, 27, 29, 31, 33, 35, 43, 91, 121, 125, 129 (U.S.

Active AFS-300 2016-07-23
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.

Active AFS-300 2017-06-27
120-17B Reliability Program Methods—Standards for Determining Time Limitations

This publication provides guidance for developing a reliability program, which are your standards for determining time limitations.

Active AFS-300 2018-12-19
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
20-154A Guide for Developing a Receiving Inspection System for Aircraft Parts and Materials

This AC provides guidance and information for developing a receiving inspection system and for incorporation into a person’s existing receiving inspection system to help prevent the introduction of unairworthy articles into inventories.

Active AFS-300 2024-07-03
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
43-18 Fabrication of Aircraft parts by Maintenance Personnel

This advisory circular (AC) ensures that parts fabricated during maintenance and alteration have an equivalent level of safety as those parts produced under the original design holder’s production certificate.

Active AFS-300 2006-03-24
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
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
120-98A Operator Information for Incorporating Fuel Tank Flammability Reduction Requirements into a Maintenance or Inspection Program (Including Change 1)

This advisory circular (AC) provides information and describes an acceptable means of compliance (AMC) with the Reduction of Fuel Tank Flammability in Transport Category Airplanes, final rule.

Active AFS-300 2012-06-22
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).

Active AFS-300 2013-09-20
120-16G Air Carrier Maintenance Programs

This advisory circular (AC) explains what the term “maintenance program” means. Our explanation describes the scope and content of air carrier aircraft maintenance programs.

Active AFS-300 2016-01-04
43-210A Standardized Procedures for Obtaining Approval of Data Used in the Performance of Major Repairs and Major Alterations - Change 1

This advisory circular (AC) describes a standardized procedure for requesting approval of technical data associated with major repairs/major alterations.

Active AFS-300 2016-08-17
91-91 Maintaining Public Aircraft

This AC is intended to provide guidance for developing maintenance and inspection programs for aircraft operated as public aircraft.

Active AFS-300 2016-10-19
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
43-6D Altitude Reporting Equipment and Transponder System Maintenance and Inspection Practices

This advisory circular (AC) provides information concerning acceptable methods of testing altimeters, static systems, altitude encoders, and air traffic control (ATC) transponder systems (ATCTS).

Active AFS-300 2017-02-15
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.

Active AFS-300 2018-09-25
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
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.

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

This AC provides guidance for developing a software management program and showing compliance with applicable regulations related to continued airworthiness when managing aircraft software during maintenance activities.

Active AFS-300 2023-08-25
120-77A Performance Rules: Provisions Contained in an Operator Manual Under § 43.13(c)

This AC provides one means, but not the only means, of ensuring that the contemplated maintenance, alteration, or continue-in-service condition is in compliance with applicable regulations and existing policy.

Active AFS-300 2023-10-24
20-105C Reciprocating Engine Power-Loss Accident Prevention and Trend Monitoring

This AC discusses the circumstances surrounding engine power-loss accidents. It provides recommendations on how, through individual effort and consideration, those accidents can be prevented.

Active AFS-300 2023-12-18
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
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
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
43-208 Maintenance of Emergency Evacuations Systems for Aircraft Operating Under Part 121

This advisory circular (AC) provides information and guidance for the maintenance of emergency evacuation systems (EES) used on aircraft operating under the provisions of Title 14 of the Code of Federal Regulations (14 CFR) part 121.

Active AFS-300 2003-04-04
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
43.13-2B Acceptable Methods, Techniques, and Practices - Aircraft Alterations Active AFS-300 2008-03-03
43.13-1B Acceptable Methods, Techniques, and Practices - Aircraft Inspection and Repair [Large AC. This includes Change 1.]

This advisory circular (AC) contains methods, techniques, and practices acceptable to the Administrator for the inspection and repair of nonpressurized areas of civil aircraft, only when there are no manufacturer repair or maintenance instructions.

Active AFS-300 1998-09-08
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
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
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
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
43-217 Anticollision Light Maintenance (ACLM)

This AC provides guidance in developing an anticollision light maintenance program. This AC describes an acceptable means, but not the only means, to comply with Title 14 of the Code of Federal Regulations (14 CFR).

Active AFS-300 2018-12-12
43-218 Operational Authorization of Integrated Aircraft Health Management System

Aircraft health monitoring for maintenance uses onboard sensors, data transmission, and data analysis to provide information regarding aircraft system performance and structural condition.

Active AFS-300 2022-07-08
135-7B Part 135: Additional Maintenance Requirements for Aircraft Type Certificated for Nine or Less Passenger Seats

This advisory circular (AC) provides information for establishing methods acceptable to the Administrator for compliance with the additional maintenance requirements of Title 14 of the Code of Federal Regulations (14 CFR) part 135, § 135.421 for certain air carriers and commercial operators.

Active AFS-300 2016-08-11
43-215 Standardized Procedures for Performing Aircraft Magnetic Compass Calibration

This advisory circular (AC) describes procedures for calibrating an aircraft magnetic compass to minimize the effect of aircraft-induced magnetic fields.

Active AFS-300 2017-08-07
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
119-1A Operational Authorization of Aircraft Network Security Program

This AC describes an acceptable means, but not the only means, of obtaining operational authorization for an aircraft certificated with a special condition (SC) related to the security of the onboard computer network.

Active AFS-300 2023-09-28
135-10C Approved Aircraft Inspection Program including Change 1

This AC provides information and guidance for a Title 14 of the Code of Federal Regulations (14 CFR) part 135, § 135.419, Approved Aircraft Inspection Program (AAIP).

Active AFS-300 2023-05-23
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
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
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
136-2 Recommended Aircraft Maintenance Practices for Commercial Air Tour Operators - Change 1 Included

This AC describes maintenance practices that we, the Federal Aviation Administration (FAA), recommend for aircraft that you, a commercial air tour operator, use to perform commercial air tours.

Active AFS-300 2014-01-22
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
120-113 Best Practices for Engine Time In Service Interval Extensions - Change 1

This advisory circular (AC) provides information on engine time in service interval extensions.

Active AFS-300 2016-01-06
120-115 Maintainer Fatigue Risk Management

This advisory circular (AC):

1. 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
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
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
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
91-55A Reduction of Electrical System Failures Following Aircraft Engine Starting

This AC is to warn general aviation aircraft owners/pilots and maintenance personnel of possible total electrical
system failure following aircraft engine starting.

Active AFS-300 2023-10-11
65-30B Overview of the Aviation Maintenance Profession with Change 1

This AC was prepared by the Federal Aviation Administration (FAA) Flight Standards Service (FS) to provide information to prospective Airframe and Powerplant (A&P) mechanics and other aviation maintenance professionals interested in a career in aviation maintenance.

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
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
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
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
65-23B Certification of a Repairman (Experimental Aircraft Builders)

This AC provides information to builders of experimental aircraft concerning repairman certification.

Active AFS-300 2024-09-27