FAR Part 135 Duty & Rest Checker

About the FAR Part 135 Duty & Rest Checker

The FAR Part 135 duty and rest calculator provides charter pilots, crew schedulers, and aviation directors with a foolproof operational compliance check. Instantly validate flight assignments against complex FAA legal limits, tracking rolling flight times and mandatory rest periods to prevent dangerous pilot fatigue and operational violations.

How it works

1. Input the pilot's previous flight times over rolling 500, 800, and 1400-hour lookback periods.
2. Enter the scheduled duty period, including the start time, end time, and total planned flight hours.
3. Verify that the scheduled rest period provides the required 10 consecutive hours or appropriate compensatory rest.

Frequently asked questions

What is the standard flight time limit for unscheduled Part 135 operations?

A single pilot cannot exceed 8 hours of flight time within a 24-consecutive-hour period, or 10 hours for a two-pilot crew, without triggering compensatory rest rules.

Can duty time be extended for weather delays?

Flight time limits can be exceeded if the delay is caused by circumstances beyond the operator's control occurring after takeoff, but compensatory rest must be provided.

What constitutes 'rest' under FAA definitions?

Rest must be prospective, meaning the pilot is notified in advance, and completely free from all present responsibility for work or duty on behalf of the certificate holder.

How do rolling flight time limits work?

Pilots must not exceed 500 hours in any calendar quarter, 800 hours in any two consecutive calendar quarters, and 1,400 hours in any calendar year.

References

• 14 CFR Part 135.267 Flight time limitations and rest requirements
• FAA Advisory Circular AC 120-100 Basics of Aviation Fatigue