What happened
On 9 April 2022, a Fouere Olivier Viking MK 2, registration F-PYZO, departed Lorient - Lann-Bihoué airport for a cross-country flight around Belle-Île-en-Mer. The flight was accompanied by a pilot and one passenger. During the flight, the pilot allowed the passenger to take the controls to gain experience with the aircraft's handling.
While on the return leg of the flight, the passenger realized that the pilot had become pale and unconscious. Unable to revive him, the passenger took control of the aircraft to perform an emergency descent. Lacking knowledge of nearby aerodromes and unable to reach the engine power controls located on the pilot's side, the passenger identified a field that appeared suitable for landing.
The aircraft performed a forced landing in a marshy area. Upon impact, the aircraft's canopy was displaced, and the airframe was destroyed. The passenger sustained injuries but was able to evacuate the wreckage before water entered the cabin. The pilot was found deceased at the scene.
The investigation
The investigation focused on the circumstances leading to the pilot's sudden loss of consciousness and the subsequent emergency landing. Investigators reviewed radar data, radio communications, and the search and rescue operation. The investigation also examined the pilot's medical history, noting that he had recently undergone surgery involving general anesthesia, though no heart issues were identified during his medical examination five days prior to the accident.
Findings
- The pilot suffered a sudden incapacitation characterized by cardiorespiratory arrest, which occurred without any prior warning signs.
- The passenger, who had limited flying experience, was unable to reach the power control to reduce engine thrust during the descent.
- The choice of landing site was dictated by the passenger's lack of familiarity with local aerodromes and the immediate need to land.
- The aircraft's destruction was caused by the impact with the marshy terrain.
- The passenger's use of the shoulder straps of her four-point harness helped mitigate the severity of her injuries.