14 CFR 117.25 — Rest Period
Requires a minimum 10-hour rest period with opportunity for 8 hours uninterrupted sleep between duty periods.
Regulation Text
No certificate holder may assign and no flightcrew member may accept assignment to any reserve or duty with the certificate holder during any required rest period. Before beginning any reserve or duty, a flightcrew member must be given a rest period of at least 10 consecutive hours, which must encompass an opportunity for at least 8 uninterrupted hours of sleep.
Note: This is an excerpt. Refer to the full regulation in eCFR for the complete text.
Plain-English Explanation
Airline pilots must get at least 10 hours of rest between duty periods, with the opportunity for 8 hours of uninterrupted sleep. This means travel to/from the hotel, meals, and personal time must fit within that 10 hours while still allowing 8 hours of sleep opportunity. If rest is in a hotel, the 10 hours starts when the pilot arrives at the hotel. This regulation is critical for managing fatigue in airline operations and is a frequent topic on ATP and dispatcher exams.
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Related Regulations
14 CFR 117.11 — Flight Time Limitations
Limits Part 121 flight crew to maximum flight time based on time of start and number of flight segments. Absolute maximum of 100 hours in 672 consecutive hours.
§121.13514 CFR 121.135 — Manual Contents
Requires each airline to maintain a manual that includes procedures, policies, and instructions for operations personnel.
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