What happened
On April 17, 2016, a paramotor identified 08-NR was performing a local flight near Raucourt-et-Flaba, France. During the initial climb, at an altitude of approximately 20 meters, the right side of the wing collapsed for one to two seconds before reinflating. Simultaneously, the engine's power decreased. This loss of thrust caused the wing to pitch forward, leading to a sudden loss of altitude and a collision with the ground. The pilot, who had deployed a reserve parachute, was unable to avoid the impact due to the low altitude. The pilot subsequently died from injuries sustained in the crash.
The investigation
Investigators analyzed video footage from a nearby witness, which captured the entire sequence from inflation to impact. Spectral analysis of the audio confirmed that the engine power decreased progressively for about one second prior to the wing collapse. The investigation examined the aircraft's engine, fuel, and ignition systems, finding no mechanical defects or discontinuities in the flight controls. The engine was found to be free of rotation, and the propeller showed damage consistent with a low-power impact.
Regarding the pilot, the investigation noted that the pilot was seated in a way that could have caused movement within the harness. The takeoff was performed with a crosswind, and the takeoff site was near wooded areas that could create turbulent air. The investigation also noted that the pilot's position in the harness during the takeoff phase might have contributed to the accidental reduction of throttle.
Findings
- The primary cause of the accident was a sudden reduction in engine power during the climb, which triggered the wing collapse.
- The takeoff was conducted with a crosswind, increasing the risk of asymmetric wing closure.
- The pilot's movement within the harness during the takeoff process may have led to an unintentional reduction in throttle.
- The low altitude at the time of the wing collapse rendered the reserve parachute ineffective.
- The presence of nearby trees may have created localized turbulence, contributing to the instability of the wing.