AAIB investigation to Parrot Anafi (UAS, registration N/A) 170720
Propeller failure, Green Lane, Yeadon, West Yorkshire, 17 July 2020.
Summary:
皇冠体育app operator was conducting a night search of roof tops. About 15 minutes after takeoff, when the UA was at about 50 agl, the pilot noticed the control screen flicker and heard the speed of the UA鈥檚 motors increase without any input from him. 皇冠体育app UA then started to turn and, despite inputs from the pilot, was unresponsive. He attempted to descend the UA to conduct an emergency landing and then selected the 鈥楻eturn to Home鈥� function, but it did not respond. 皇冠体育app UA then entered an uncontrolled descent onto the roof, where it came to rest.
皇冠体育app UA was recovered with damage to its two front left propellers and battery. 皇冠体育appre was also minor damage to the roof covering.
皇冠体育app pilot believed that, given the clean fractures on the propellers and the way the motors reacted, the UA had suffered a failure of the two propellers.
皇冠体育app AAIB published another reported failure of propellers on a Parrot Anafi in its 9/2020 Bulletin.
Safety actions
Previously the operator would only replace damaged propellers but, as a result of the safety action taken in the published event, they will now also change the propellers every 5 hours flight time. 皇冠体育appy will also make a video recording of all pre- and post-flight safety checks.
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