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Regulations last checked for updates: Dec 15, 2025
Title 14 - Aeronautics and Space last revised: Nov 03, 2025
All Titles
Title 14
Chapter I
Part 121
Subpart O - Subpart O—Crewmember Qualifications
§ 121.431 - Applicability.
§ 121.432 - General.
§ 121.433 - Training required.
§ 121.434 - Operating experience, operating cycles, and consolidation of knowledge and skills.
§ 121.435 - Pilots: Operations Familiarization.
§ 121.436 - Pilot Qualification: Certificates and experience requirements.
§ 121.438 - Pilot operating limitations and pairing requirements.
§ 121.439 - Pilot qualification: Recent experience.
§ 121.440 - Line checks.
§ 121.441 - Proficiency checks.
§ 121.443 - Pilot in command qualification: Route and airports.
§ 121.445 - Pilot in command airport qualification: Special areas and airports.
§ 121.447 - [Reserved]
§ 121.453 - Flight engineer qualifications.
§§ 121.455-121.459 - §[Reserved]
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