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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 1861 - 1880 of 2072 results
  • AC 9020 Weather Radio RADOMES
    AC 90-20: Weather Radio RADOMES
    United States. Department of Transportation. Federal Aviation Administration
    1964-11-12 | PDF
    This Advisory Circular highlights some important points to consider in the selection and maintenance of weather radar radomes.
  • AC 9021 Dualing of Service O Circuits 8273 8275 and 8276
    AC 90-21: Dualing of Service O Circuits 8273, 8275 and 8276
    United States. Department of Transportation. Federal Aviation Administration
    1965-03-01 | PDF
    This circular advises Service 0 subscribers of plans to provide dual Service 0 circuits 8273, 8275 and 8276, effective March 1, 1965. It provides revised weather schedules by circuit to enable users to determine which circuit(s) will be required to meet their needs.
  • AC 9022 Automatic Terminal Information Service Atis
    AC 90-22: Automatic Terminal Information Service (Atis)
    United States. Department of Transportation. Federal Aviation Administration
    1965-02-17 | PDF
    This circular provides information concerning the establishment and operation of Automatic Terminal Information Service (ATIS).
  • AC 9022A Automatic Terminal Information Service Atis
    AC 90-22A: Automatic Terminal Information Service (Atis)
    United States. Department of Transportation. Federal Aviation Administration
    1968-10-09 | PDF
    This circular provides updated information concerning the operation of Automatic Terminal Information Service (ATIS).
  • AC 9022B Automatic Terminal Information Service Atis
    AC 90-22B: Automatic Terminal Information Service (Atis)
    United States. Department of Transportation. Federal Aviation Administration
    1970-01-30 | PDF
    This circular provides updated information concerning the operation of Automatic Terminal Information Service (ATIS).
  • AC 9022C Automatic Terminal Information Service Atis
    AC 90-22C: Automatic Terminal Information Service (Atis)
    United States. Department of Transportation. Federal Aviation Administration
    1971-02-02 | PDF
    This circular provides updated information concerning the operation of Automatic Terminal Information Service (ATIS).
  • AC 9023 Wake Turbulence
    AC 90-23: Wake Turbulence
    United States. Department of Transportation. Federal Aviation Administration
    1965-02-24 | PDF
    This Circular provides information on the subject of wake turbulence and suggests techniques that may help pilots avoid the hazards associated with wing tip vortex turbulence.
  • AC 9023A Wake Turbulence
    AC 90-23A: Wake Turbulence
    United States. Department of Transportation. Federal Aviation Administration
    1965-11-20 | PDF
    This Advisory Circular cancels AC 90-23, dated 2/24/65. For years turbulence generated by aircraft was attributed to "prop wash." The "prop wash" behind other aircraft caused some pretty rough rides, "go-arounds," some accidents and was the subject of a lot of "hangar flying.
  • AC 9023B Wake Turbulence
    AC 90-23B: Wake Turbulence
    United States. Department of Transportation. Federal Aviation Administration
    1971-02-19 | PDF
    This advisory circular alerts pilots to the hazards of trailing vortex wake turbulence and related operational problems.
  • AC 9023B Wake Turbulence
    AC 90-23B: Wake Turbulence
    United States. Department of Transportation. Federal Aviation Administration
    1971-05-17 | PDF
    This advisory circular alerts pilots to the hazards of trailing vortex wake turbulence and recommends related operational procedures.
  • AC 9023C Wake Turbulence
    AC 90-23C: Wake Turbulence
    United States. Department of Transportation. Federal Aviation Administration
    1972-05-16 | PDF
    The strength of the vortex is governed primarily by the weight, speed, and shape of the wing of the generating aircraft. The vortex characteristics of any given aircraft can also be changed by extension of flaps or other wing configuring devices as well as by change in speed. However, the basic factor is weight, and the vortex strength increases wi ...
  • AC 9023D Aircraft Wake Turbulence
    AC 90-23D: Aircraft Wake Turbulence
    United States. Department of Transportation. Federal Aviation Administration
    1972-12-15 | PDF
    This advisory circular alerts pilots to the hazards of aircraft trailing vortex wake turbulence and recommends related operational procedures.
  • AC 9024 Service A Weather Teletypewriter Circuit Loading Adjustment
    AC 90-24: Service A Weather Teletypewriter Circuit Loading Adjustment
    United States. Department of Transportation. Federal Aviation Administration
    1965-03-15 | PDF
    This circular advises Service A weather teletypewriter system subscribers of a pending transfer of certain data from Area to Supplemental Circuits and provides lead time for obtaining extension service on the latter where necessary to continue receiving such data.
  • AC 9025 Contact Approach
    AC 90-25: Contact Approach
    United States. Department of Transportation. Federal Aviation Administration
    1965-03-22 | PDF
    This circular announces Federal Aviation Agency actions concerning the flight procedure commonly known as a "contact-approach." It describes a newly adopted definition and the conditions under which air traffic control may authorize use of that procedure.
  • AC 9026 Retention of ATC Facility Voice Recordings and Flight Progress Strips Reduced to 15 Days
    AC 90-26: Retention of ATC Facility Voice Recordings and Flight Progress Strips Reduced to 15 Days
    United States. Department of Transportation. Federal Aviation Administration
    1965-07-01 | PDF
    ATC facility voice recordings and flight progress strips formerly were retained for 30 days. Since experience has shown that these records are rarely referred to after fifteen days, unless connected with a specific accident or incident, the normal retention period has been reduced to 15 days. Savings afforded by this reduction will total thousands ...
  • AC 9027 Operation of Pictorial DisplayCourse Line Computer Equipment in the National Airspace System
    AC 90-27: Operation of Pictorial Display/Course Line Computer Equipment in the National Airspace System
    United States. Department of Transportation. Federal Aviation Administration
    1965-08-20 | PDF
    This circular sets forth the advantages to be gained by the utilization of airborne Pictorial Display/Course Line Computer (PD/CLC) equipment in conjunction with VOR/DME/TACAN ground facilities.
  • AC 9028 Course Changes While Operating Under Instrument Flight Rules Below 18000 Feet Mean Sea Level
    AC 90-28: Course Changes While Operating Under Instrument Flight Rules Below 18,000 Feet Mean Sea Level
    United States. Department of Transportation. Federal Aviation Administration
    1965-09-02 | PDF
    This circular reminds pilots making course changes that routings prescribed in air traffic control clearances must be adhered to as closely as possible in order that flight paths will remain within airway/route boundaries during en route and terminal flight operations.
  • AC 9029 Prescribed IFR Departure Procedures
    AC 90-29: Prescribed IFR Departure Procedures
    United States. Department of Transportation. Federal Aviation Administration
    1965-09-16 | PDF
    This Circular is to advise pilots of the source of information relative to IFR departure procedures published by the Agency for terrain/obstruction avoidance purposes.
  • AC 9030 Precision Approach Radar PAR Service
    AC 90-30: Precision Approach Radar (PAR) Service
    United States. Department of Transportation. Federal Aviation Administration
    1966-01-01 | PDF
    This circular provides information concerning the provision of Precision Approach Radar (PAR) service at Federal Aviation Agency (FAA) operated air traffic control facilities.
  • AC 9030A Precision Approach Radar PAR Service
    AC 90-30A: Precision Approach Radar (PAR) Service
    United States. Department of Transportation. Federal Aviation Administration
    1967-11-21 | PDF
    This circular provides information concerning Precision Approach Radar (PAR) service at Federal Aviation Administration (FAA) operated air traffic control facilities.
1861 - 1880 / 2072
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