https://www.gov.uk/aaib-reports/aaib...cavalon-g-ckyt Not without controversy:
"The BFU, representing the state of design and manufacture, provided comment on the draft Final Report. The BFU Accredited Representative, stated that in their opinion the failure of the rotor was a direct consequence of a complete and unrecoverable loss of control of the gyroplane. As such, the flight loads which resulted in the failure were outside of the design requirements and neither the current design of the Cavalon nor the certification regulations require amendment as a result of this accident. They stated that in their opinion the loss of control of the gyroplane was a result of the actions of the pilot. Several adjustments were made to the report as a result of comments received during the consultation process. However, the investigation did not find evidence indicating a complete and unrecoverable loss of control before the catastrophic failure of the rotorhead, and so this point of disagreement is appended to the Final Report. "
IM