AAIB investigation to Yuneec H520 (UAS registration n/a) 240420
Loss of power to aircraft in turbulent conditions, Hove, East Sussex, 24 April 2020.
Summary:
The aircraft dropped to the ground from a height of 15 m when power was lost to the electric motors even though the battery’s energy level (State of Charge) was 97.7%. The wind conditions were turbulent and an investigation by the Unmanned Aircraft System’s (UAS) manufacturer concluded that the probable cause for the power loss was that the battery had become loose in flight.
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Published 10 September 2020