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What is the most likely reason for the starter not turning when activated?

  • A

    The magnetos are defect.

  • B

    The ignition is short-circuited.

  • C

    The rotor break is engaged.

  • D

    The alternator is defect.

In the R22 helicopter, the rotor brake is used to stop the rotor from spinning. It's mounted on the back of the main gearbox and operated by a cable connected to a handle on the cabin ceiling. Before starting the engine, the rotor brake must be released. If the brake is engaged, the starter is automatically disabled. This is to prevent damage to the starter and gearbox, as trying to start the engine with the brake on could cause excessive strain and lead to mechanical failure. Disabling the starter ensures the brake is released, protecting the helicopter's components.

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  • Austro Control