14 CFR 117.5 : Aeronautics And Space (§ 1.1 To Parts 1311-1399) — (§ 110.1 To Part 199) — Federal Aviation Administration, Department Of Transportation (Continued) (§ 110.1 To Part 199) — Air Carriers And Operators For Compensation Or Hire: Certification And Operations (§ 110.1 To § 139.343) — Flight And Duty Limitations And Rest Requirements: Flightcrew Members (§ 117.1 To § 117.29) — Fitness for duty.