What happened
The pilot reported that he was assisted by a wing walker while taxiing toward the runway for departure. During this phase, the wind conditions had been steadily increasing in speed and shifting direction as the aircraft reached the takeoff position. As the pilot aligned the aircraft with Runway 27, the right wing rose unexpectedly. In an effort to maintain control and proceed with the takeoff, the pilot applied additional power. However, he was unable to keep the aircraft on the ground. The aircraft tipped onto its left wing, struck a dirt bank, and cartwheeled before coming to rest upright on its landing gear approximately 200 feet from the point where the incident began.
The pilot noted that he had instructed the passenger to secure her single-strap shoulder harness prior to taxiing. However, upon reaching the takeoff position, she removed the restraint due to discomfort. When the aircraft began to roll, the pilot attempted to protect her by sliding out from under his own shoulder harness. He later expressed the opinion that if the passenger had kept her harness fastened, neither occupant would have sustained injuries.
The investigation
Post-accident examination revealed significant damage to the airframe consistent with a ground loop and cartwheeling event. The pilot reported wind conditions of variable direction from 230 to 290 degrees at 35 knots, gusting to 55 knots at the time of the occurrence.
Findings
The primary factors contributing to this accident were the strong and gusty crosswind conditions and the pilot's inability to maintain directional control during the takeoff roll. The sudden increase in wind speed and shift in direction likely induced a wing rise that exceeded the pilot's ability to correct with available power and rudder input. The presence of a wing walker and the passenger's removal of her safety restraint are noted as contextual factors, though the mechanical failure or loss of control was driven by environmental conditions.
Safety message
Pilots operating in high-wind environments should be vigilant for sudden changes in wind speed and direction, particularly during critical phases like takeoff. Ensuring that all occupants remain securely fastened in their restraints throughout taxi, takeoff, and landing is essential for safety, as unexpected aircraft movements can occur without warning.