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FAA Advisory Circulars

rosaP Repository & Open Science Access Portal

FAA Advisories concern how to comply with airworthiness regulations. This collection was published from 1957 to 2000. The FAA Advisory Circular System was established for the publication of nonregulatory guidance and informational material to the public. Bookmark this collection: https://rosap.ntl.bts.gov/collection_faacirculars or https://doi.org/10.21949/1530829.

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Showing 1041 - 1060 of 2072 results
  • AC 2020A Flammability of Jet Fuels
    AC 20-20A: Flammability of Jet Fuels
    United States. Department of Transportation. Federal Aviation Administration
    1965-04-09 | PDF
    This circular presents information on the factors which determine the possibility of combustion in aircraft fuel tanks in the event an ignition source should occur. Interest has focused on this subject due to the possibility that a lightning strike was responsible for a recent aircraft accident.
  • AC 2021 Application of Glass Fiber Laminates in Aircraft
    AC 20-21: Application of Glass Fiber Laminates in Aircraft
    United States. Department of Transportation. Federal Aviation Administration
    1964-01-01 | PDF
    This circular is to provide information on the past and present use of reinforced plastics in aircraft, the engineering and design considerations, and the manufacturing methods insofar as they relate to and affect the strength and durability characteristics of reinforced plastics.
  • AC 2022 Summary of Supplemental Type Certificates and Approved Replacement Parts
    AC 20-22: Summary of Supplemental Type Certificates and Approved Replacement Parts
    United States. Department of Transportation. Federal Aviation Administration
    1964-03-19 | PDF
    This circular is to advise that the subject summary is no longer for sale by the Superintendent of Documents, United States Government Printing Office.
  • AC 2022A Summary of Supplemental Type Certificates and Approved Replacement Parts
    AC 20-22A: Summary of Supplemental Type Certificates and Approved Replacement Parts
    United States. Department of Transportation. Federal Aviation Administration
    1964-10-01 | PDF
    This circular is to advise that the subject summary is no longer for sale by the Superintendent of Documents, United States Government Printing Office.
  • AC 2023 Interchange of Service Experience Mechanical Difficulties
    AC 20-23: Interchange of Service Experience - Mechanical Difficulties
    United States. Department of Transportation. Federal Aviation Administration
    1964-06-04 | PDF
    This circular advises the public of the malfunction and defect program and its relationship to the General Aviation Inspection Aids.
  • AC 2023A Interchange of Service Experience Mechanical Difficulties
    AC 20-23A: Interchange of Service Experience - Mechanical Difficulties
    United States. Department of Transportation. Federal Aviation Administration
    1966-08-18 | PDF
    This advisory circular provides information on the subject of voluntarily exchanging service experience data that may be used to improv the durability and safety of aeronautical products.
  • AC 2023B Interchange of Service Experience Mechanical Difficulties
    AC 20-23B: Interchange of Service Experience - Mechanical Difficulties
    United States. Department of Transportation. Federal Aviation Administration
    1967-12-07 | PDF
    This advisory circular provides information on the subject of voluntarily exchanging service experience data that may be used to improve the durability and safety of aeronautical products.
  • AC 2023C Interchange of Service Experience Mechanical Difficulties
    AC 20-23C: Interchange of Service Experience - Mechanical Difficulties
    United States. Department of Transportation. Federal Aviation Administration
    1969-05-09 | PDF
    This Advisory Circular provides information on the voluntary exchange of service experience data used in improving durability and safety of aeronautical products.
  • AC 2023D Interchange of Service Experience Mechanical Difficulties
    AC 20-23D: Interchange of Service Experience - Mechanical Difficulties
    United States. Department of Transportation. Federal Aviation Administration
    1971-02-12 | PDF
    This advisory circular provides information on the voluntary exchange of service experience data used in improving durability and safety of aeronautical products.
  • AC 2024 Qualification of Fuels Lubricants and Additives
    AC 20-24: Qualification of Fuels, Lubricants, and Additives
    United States. Department of Transportation. Federal Aviation Administration
    1964-06-16 | PDF
    This Advisory Circular advises the public of the availability of Maintenance Review Board Reports. These documents outline initial inspection and overhaul periods as approved by the Federal Aviation Agency Maintenance Review Board for the airframe airframe systems, and associated components. They contain guidance information for the preparation of ...
  • AC 2024A Qualification of Fuels Lubricants and Additives
    AC 20-24A: Qualification of Fuels, Lubricants, and Additives
    United States. Department of Transportation. Federal Aviation Administration
    1967-04-14 | PDF
    This circular describes procedures that may be used for approving the subject materials for use in certificated aircraft.
  • AC 2024B Qualification of Fuels Lubricants and Additives for Aircraft Engines
    AC 20-24B: Qualification of Fuels, Lubricants, and Additives for Aircraft Engines
    United States. Department of Transportation. Federal Aviation Administration
    1985-12-20 | PDF
    This advisory circular (AC) provides acceptable procedures for approving the qualification of fuels, lubricants, and additives for use in certificated aircraft engines. These are not the only acceptable procedures so consideration will be given to any other procedures an applicant elects to present.
  • AC 2025 Identification of Technical Standard Order Tso Safety Belts
    AC 20-25: Identification of Technical Standard Order (Tso) Safety Belts
    United States. Department of Transportation. Federal Aviation Administration
    1964-07-05 | PDF
    This circular is to describe the markings which indicate that a safety belt has been manufactured under the Federal Aviation Agency Technical Standard Order (TSO) system, and is, therefore, approved for use in certificated aircraft.
  • AC 2025A Identification of Technical Standard Order Tso Safety Belts
    AC 20-25A: Identification of Technical Standard Order (Tso) Safety Belts
    United States. Department of Transportation. Federal Aviation Administration
    1969-03-14 | PDF
    This circular is to describe the markings which indicate that a safety belt has been manufactured under the Federal Aviation Administration Technical Standard Order (TSO) authorization, and is, therefore, approved for use in certificated aircraft.
  • AC 2026 CHANGE 1 Turbine and Compressor Rotors Type Certification Substantiation Procedures
    AC 20-26 CHANGE 1: Turbine and Compressor Rotors Type Certification Substantiation Procedures
    United States. Department of Transportation. Federal Aviation Administration
    1964-09-18 | PDF
    This circular transmits a revised page. CHANGE. The overspeed r.p.m. figure in paragraph 4c(2)(a) is revised to read 115 percent. Testing a complete engine to 115 percent is considered substantially equivalent to rig testing rotor components separately to 120 percent.
  • AC 2027 Certification and Operation of AmateurBuilt Aircraft
    AC 20-27: Certification and Operation of Amateur-Built Aircraft
    United States. Department of Transportation. Federal Aviation Administration
    1964-07-31 | PDF
    This advisory circular has been prepared to provide information and guidance material for amateur aircraft builders.
  • AC 2027B Certification and Operation of AmateurBuilt Aircraft
    AC 20-27B: Certification and Operation of Amateur-Built Aircraft
    United States. Department of Transportation. Federal Aviation Administration
    1972-04-20 | PDF
    This advisory circular provides information and guidance concerning certification and operation of amateur-built aircraft, including gliders, free balloons, helicopters, and gyroplanes, and sets forth an acceptable means, not the sole means, of compliance with Federal Aviation Regulations (FAR) Part 21, Sections 21.191 and 21.193, and FAR Part 91, ...
  • AC 2027C Certification and Operation of AmateurBuilt Aircraft
    AC 20-27C: Certification and Operation of Amateur-Built Aircraft
    United States. Department of Transportation. Federal Aviation Administration
    1983-04-01 | PDF
    This advisory circular (AC) provides guidance and information relative to the airworthiness certification and operation of amateur-built aircraft.
  • AC 2027D Certification and Operation of AmateurBuilt Aircraft
    AC 20-27D: Certification and Operation of Amateur-Built Aircraft
    United States. Department of Transportation. Federal Aviation Administration
    1990-06-22 | PDF
    This advisory circular (AC) provides guidance concerning the building, certification, and operation of amateur-built aircraft of all types; explains how much fabrication and assembly the builder must do for the aircraft to be eligible for amateur-built certification; and describes the Federal Aviation Administration (FAA) role in the certification ...
  • AC 2028 Nationally Advertised Aircraft Construction Kits
    AC 20-28: Nationally Advertised Aircraft Construction Kits
    United States. Department of Transportation. Federal Aviation Administration
    1964-08-07 | PDF
    This circular is to call to the attention of persons contemplating the use of nationally advertised kits for the construction of an aircraft, that certain kits when used could render the aircraft ineligible for the issuance of an experimental certificate as an amateur-built aircraft.
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