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United States Department of Transportation United States Department of Transportation

Advisory Circulars (ACs)

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Number, title, description, or office

Advisory Circulars (ACs) search results
Number Title Status Office Date
43-2B Minimum Barometry for Calibration and Test of Atmospheric Pressure Instruments

Provides guidance material which may be used to determine the adequacy of barometers used in the calibration of aircraft static instruments and presents information concerning the general operation, calibration, and maintenance of such barometers.

Active AFS-343 1980-10-16
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
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
43-4B Corrosion Control for Aircraft

This advisory circular (AC) is a summary of the current available data regarding identification and treatment of corrosive attack on aircraft structures and engine materials.

Active AFS-300 2018-09-11
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
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
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
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
43-14 Maintenance of Weather Radar Radomes

Provides guidance material useful to repair facilities in the maintenance of weather radomes.

Active AFS-350 1977-02-24
43-206 Inspection, Prevention, Control, and Repair of Corrosion on Avionics Equipment

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
43-9C Maintenance Records

Describes methods, procedures and practices determined to be acceptable for showing compliance with the general aviation maintenance record-making and record-keeping requirements of Title 14 of the Code of Federal Regulations (14 CFR) parts 43 and 91.

Active AFS-340 1998-06-08
43-15 Recommended Guidelines for Instrument Shops

Provides guidelines concerning environmental conditions for instrument repair and overhaul shops and information on calibration of test equipment.

Active AFS-350 1977-08-15
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
43-207 Correlation, Operation, Design, and Modification of Turbofan/Jet Engine Test Cells

Provides guidance regarding test cell correlation procedures for test cells used for in-service acceptance testing of turbofan and turbojet engines.

Active AFS-100 2002-12-26
43.13-2B Acceptable Methods, Techniques, and Practices - Aircraft Alterations Active AFS-300 2008-03-03
43-11 Reciprocating Engine Overhaul Terminology and Standards - Including Change 1

This advisory circular (AC) discusses engine overhaul terminology and standards used in the aviation industry.

Active AFS-340 1976-04-07
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
43-12A Preventive Maintenance

This advisory circular (AC) provides information concerning preventive maintenance,including who may perform it, the standards of performance applicable to it, authority for approval for return to service, and the applicable recording requirements.

Active AFS-340 1983-10-28
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