The U.S. National Transportation Safety Board has confirmed component failure resulting in the separation of a propeller as the probable cause of the Feb. 16, 2022, accident in which one of Joby Aviation’s eVTOL prototypes crashed during testing in a rural area of California. The agency’s final report published on February 7 determined that the blade separation caused “cascading effects to include the separation of multiple propulsion motor/propeller assemblies and the loss of remote pilot control of the aircraft.”
Investigators also identified a flaw in the tilt-rotor actuator link in part of the propulsion system that allowed propeller blades to be at a steeper angle than commanded to be a contributing factor. There were no injuries resulting from the crash, which occurred when the aircraft was flying at an altitude of 8,900 feet, having reached its maximum dive speed of 181 knots indicated airspeed, which was slightly above its top speed.
Information in the NTSB’s accident docket shows that the propeller blade release was from the aircraft’s “propulsion station 3” located on the right wing inboard. The report did not include any safety recommendations.
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