What is the maximum flight time allowed for the duty crew?

What is the maximum flight time allowed for the duty crew?

• A. 6 hours
• B. 4 hours
• C. 8 hours
• D. 5 hours

Answer: (A)

Fatigue management drives this limit: keeping continuous flight time to six hours helps maintain alertness and reduce error risk. Six hours provides a safety margin where the crew can perform effectively without the degraded performance that comes with longer periods of continuous operation. The other durations don’t align with this safety standard—four or five hours would unnecessarily shorten duty time, while eight hours would exceed safe limits without a relief crew or mandated rest. If a mission needs more than six hours of flight time, a second crew or a planned rest/relief is used to stay within the limit.

Fatigue management drives this limit: keeping continuous flight time to six hours helps maintain alertness and reduce error risk. Six hours provides a safety margin where the crew can perform effectively without the degraded performance that comes with longer periods of continuous operation. The other durations don’t align with this safety standard—four or five hours would unnecessarily shorten duty time, while eight hours would exceed safe limits without a relief crew or mandated rest. If a mission needs more than six hours of flight time, a second crew or a planned rest/relief is used to stay within the limit.