Crew Duty and Block Time Limits (FAA Part 117)
Enter crew pickup, report, block off and block on times in UTC. See block time, flight duty period and a colour-coded duty timeline checked against Part 117.
Reference only. This models the Part 117 tables. It does not model extensions, split duty, reserve, cumulative limits or your operator's approved fatigue program. Always check the regulation and your operations manual.
Which crew complement works?
How to read this
- Block time is block off to block on, and is the flight time counted against the limit. For several sectors, enter the ground time between them.
- FDP runs from the start of duty (report, or crew van pickup if your operator counts it) to block on at the last sector. Post-flight duty follows and counts as duty, not as FDP.
- All times are UTC. The Part 117 tables use local time at the start of duty, so enter the local offset (for example 5 for UTC+5) and the tool looks up the right row.
- Colours: green is within limits, amber is legal with under one hour of margin, red is beyond a limit. The red part of the block bar is the time flown after the FDP limit.
Rules used
- Flight time (§117.11, Table A): two pilots 8 or 9 hours by start time; 13 hours with three pilots; 17 hours with four pilots.
- Flight duty period: Table B for two pilots (by start time and segments), Table C for augmented crews (by start time, 3 or 4 pilots, and rest facility class). The longest possible is 19 hours. A 30 minute reduction applies if the crew is not acclimated.
- Augmented crews (§117.17): no more than three flight segments; in-flight rest of two consecutive hours in the second half of the FDP for the pilot flying the landing, and 90 minutes for the monitoring pilot.
- Rest (§117.25): at least 10 consecutive hours before a duty period, with 8 uninterrupted hours of sleep opportunity, and 30 consecutive hours free from duty in the past 168 hours.
- Deadhead: counts as duty, and before a flight it is part of the FDP, but it is not a flight segment for Table B. If it exceeds the Table B FDP, rest equal to the deadhead length is required, and never less than 10 hours (§117.25(g)).
ICAO and EASA
ICAO Annex 6 requires each State to set flight and duty limits, or to approve a fatigue risk management system. It does not publish one numeric table. EASA limits (ORO.FTL) differ from Part 117 and are not in this tool yet. See the EASA basics guide. Source for the FAA figures: 14 CFR Part 117 and Tables A to C, as published in the eCFR, checked October 2026.