AAIB investigation to Agusta AB206B, G-WIZZ
Low rotor speed warning led to autorotation and subsequent tail boom damage due to rotor blade contact, Humberston Fitties Beach, Lincolnshire, 15 October 2021.
Summary:
The pilot reported that the low main rotor speed warning light illuminated when he pulled on the collective lever at a height of approximately 800 ft. The helicopter was flying over a beach and he “immediately entered autorotation” leading to a run-on landing at approximately 15 kt. The helicopter came to rest upright on its skids, but the main rotor blades were found to have struck the tail boom causing substantial damage. There were no injuries.
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Published 10 February 2022