What happened
On July 5, 2023, a Lancair 360, registered PH-KER, departed Karlsruhe, Germany, for a cross-country flight to Mulhouse-Habsheim aerodrome. The aircraft was operated by a private pilot accompanied by a passenger. Around 14:08, while flying the aerodrome circuit, the aircraft was recorded at a height of 225 feet traveling at 100 knots. Shortly thereafter, the aircraft was tracked at 520 feet with a ground speed of approximately 110–115 knots.
A witness on the ground observed the aircraft perform what appeared to be a half-roll before pitching sharply toward the earth, disappearing behind the tree line. The aircraft subsequently struck vegetation and the ground in a dense forest approximately 2 km east of the aerodrome. The impact resulted in two fatalities and the total destruction of the aircraft.
The investigation
The investigation focused on the flight path, wreckage analysis, and the pilot's medical history. Data from the aircraft's Garmin GPSMAP296 and radar tracking were used to reconstruct the final moments of the flight. Investigators examined the wreckage to determine if any mechanical failures contributed to the crash. The aircraft's landing gear was found to be extended, and the flap actuator was positioned near maximum extension, suggesting the aircraft was configured for landing.
Medical records were also reviewed. The pilot, a 74-year-old experienced aviator, had a history of heart rhythm disorders. While he had been managing these conditions with specific medical limitations on his certificate, investigators noted that his health was not perfect.
Findings
- The aircraft was in a landing configuration, with the landing gear extended and flaps nearly fully deployed.
- There was no evidence of mechanical failure or engine malfunction to explain the loss of control.
- Meteorological conditions were favorable, with clear skies and good visibility.
- The aircraft struck the trees on a nearly vertical flight path, indicating a sudden loss of control.
- The investigation could not definitively confirm the cause of the loss of control, but noted that the pilot may have suffered a new cardiac event during the flight.