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Module 12 Practice Questions - EASA Part-66 Module 12 - Helicopter Aerodynamics, Structures And Systems Exam

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A helicopter is established in a high descent rate at low forward airspeed with power applied, and the pilot reports rising sink rate, increasing vibration and reduced cyclic authority. The rotor is descending into its own downwash. Which condition is this?
Correct Answer:
Vortex ring state

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