U.S. Code of Federal Regulations

Regulations most recently checked for updates: Jan 21, 2026

All TitlesTitle 14Chapter IPart 91Subpart C - Subpart C—Equipment, Instrument, and Certificate Requirements
§ 91.201 - [Reserved]
§ 91.203 - Civil aircraft: Certifications required.
§ 91.205 - Powered civil aircraft with standard U.S. airworthiness certificates: Instrument and equipment requirements.
§ 91.207 - Emergency locator transmitters.
§ 91.209 - Aircraft lights.
§ 91.211 - Supplemental oxygen.
§ 91.213 - Inoperative instruments and equipment.
§ 91.215 - ATC transponder and altitude reporting equipment and use.
§ 91.217 - Data correspondence between automatically reported pressure altitude data and the pilot's altitude reference.
§ 91.219 - Altitude alerting system or device: Turbojet-powered civil airplanes.
§ 91.221 - Traffic alert and collision avoidance system equipment and use.
§ 91.223 - Terrain awareness and warning system.
§ 91.225 - Automatic Dependent Surveillance-Broadcast (ADS-B) Out equipment and use.
§ 91.227 - Automatic Dependent Surveillance-Broadcast (ADS-B) Out equipment performance requirements.
§§ 91.228-91.299 - §[Reserved]
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