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What is the required time of descend for flight gradient?

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in Aircraft Performance by (558k points)
What is the required time of descend for flight gradient?

(a) 50 min

(b) 15min

(c) 24min

(d) 70min

This question was addressed to me during an internship interview.

The origin of the question is Descent Performance in Aircraft Operations in division Climb and Descent Performance of Aircraft Performance

1 Answer

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Best answer
Correct answer is (c) 24min

Explanation: The rate of the change in the cabin pressure should not exceed 300 ft/min at sea level. This states that the cabin is pressurized to 8000ft pressure height, the descent to the sea level should not exceed 24 minutes before the take-off.

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