The rotor brake should be engaged (provided that no other procedure is described in the flight manual)...

Question

Question PPL(H) - Private Pilot License - Aircraft General Knowledge

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For outside parking.

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During all prescribed pre-flight checks on the ground.

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For inside parking.

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During start-up until reaching the prescribed rotor rpm.

Id 158 - PPL(H) EN - The rotor brake should be engaged (provided that no other procedure is described in the flight manual)...