What happened
On May 30, 2017, a pilot operating a Nuvix 15 motor glider, registration SP-MIGN, was performing a private flight. While approaching runway 29 at the Oborniki-Słonawy landing field, the aircraft encountered strong, gusty winds. During the low-altitude approach, a powerful gust caused the right side of the motor glider to strike the runway.
Recognizing that a safe landing was no longer possible, the pilot attempted a go-around. However, with the throttle fully open, the aircraft began to climb very slowly amidst the turbulent conditions and drifted uncontrollably to the right. Unable to maintain directional control, the pilot decided to perform an immediate emergency landing in an adjacent agricultural field. Upon touchdown, the aircraft overturned, resulting in substantial damage to the airframe. The pilot was able to exit the aircraft and subsequently reported the accident to the Poznań FIS and local authorities; a breathalyzer test confirmed no alcohol consumption.
The investigation
The investigation examined the pilot's qualifications, the technical state of the aircraft, and the meteorological conditions at the time of the accident. The pilot held a PHGP qualification and possessed significant flight experience, with 310 total flight hours. The Nuvix 15 had 515 total flight hours and showed no signs of unauthorized modifications, suggesting it was in good technical condition.
Investigators also analyzed the airfield's geography, noting that the landing field is situated between two forest complexes separated by approximately 200 meters. This configuration can create rotors when winds are cross-axial to the runway. Furthermore, the atmospheric conditions were highly unstable, characterized by Cumulus clouds reaching 8,000 feet, which eventually developed into a severe thunderstorm shortly after the accident.
Findings
- The pilot failed to perform an adequate assessment of the meteorological conditions prior to flight.
- The flight was conducted in atmospheric conditions unsuitable for a lightweight, wind-sensitive aircraft.
- Dynamic disturbances in the surface wind layer caused the loss of control and the subsequent impact with the ground.