What is the maximum flight hours per quarter for Part 135 operations?

• A. 400 hours
• B. 500 hours
• C. 600 hours
• D. 700 hours

Answer: (B)

Part 135 operations impose flight-time limits to help manage fatigue for crew. The key limit is the maximum flight hours a single pilot may accumulate in a three-month period, or quarter. For Part 135, that cap is 500 hours per quarter, counted as actual flight time from takeoff to landing. This limit is per pilot, not per aircraft or company, so scheduling must ensure no individual exceeds 500 hours in any quarter. If more flying is needed, the operator would need to add pilots or adjust the schedule. The other options fall short or exceed the regulation, while 500 hours reflects the regulatory ceiling for a quarter.