- Location: Hayward, California
- Accident Number: WPR24LA003
- Date & Time: October 2, 2023, 12:50 Local
- Registration: N121CB
- Aircraft: Cessna 340A
- Aircraft Damage: Substantial
- Defining Event: Medical event
- Injuries: 2 None
- Flight Conducted Under: Part 91: General aviation - Personal
https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/193184/pdf
https://data.ntsb.gov/Docket?ProjectID=193184
On October 2, 2023, about 1250 Pacific daylight time, a Cessna 340A airplane, N121CB, was substantially damaged when it was involved in an accident near Hayward, California. The pilot and passenger were not injured. The airplane was operated as a Title 14 Code of Federal Regulations Part 91 personal flight.
The pilot had just removed the airplane from his hangar and started both engines. While setting up the avionics, the pilot was suddenly incapacitated, and the airplane began to move across a taxiway. The passenger attempted to wake the pilot, but the airplane continued across a taxiway intersection and into the runway safety area before it collided with a swale. The nose landing gear collapsed and both wings sustained substantial damage.
Postaccident medical examination of the pilot attributed the loss of consciousness to an episode of abnormal heartbeat due to a previously undiagnosed underlying heart disease. Thus, the pilot’s sudden incapacitation from effects of previously undiagnosed heart disease likely caused the accident. The pilot reported that there were no preaccident mechanical malfunctions or failures with the airplane that would have precluded normal operation.
- Probable Cause: The pilot’s sudden incapacitation from effects of a previously undiagnosed underlying heart disease, which resulted in his loss of control of the airplane and subsequent impact with terrain.
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