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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
20-109B 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
20-186A 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.

Active AFS-300 2024-05-06