What happened
During the final phase of a crosswind approach, the aircraft's right wing experienced a sudden upward movement. The pilot indicated an airspeed of 50 knots during the rollout phase and expressed concern about departing the runway surface and colliding with nearby trees. In response to this situation, the pilot reduced engine power. This action caused the airplane to yaw sharply to the right by approximately 90 degrees. As a result of the uncontrolled rotation, the left main landing gear collapsed upon contact with the ground.
The investigation
The pilot provided specific meteorological data observed during the incident. Wind conditions were reported as varying from 140 degrees to 220 degrees at a speed of 10 knots, with gusts reaching up to 20 knots. These variable wind conditions contributed to the aerodynamic instability that led to the wing rise and subsequent loss of directional control.
Findings
The primary factors leading to the accident included the crosswind component and the pilot's reaction to the sudden change in aircraft attitude. The reduction of power during the rollout, while intended to slow the aircraft, exacerbated the yawing motion caused by the wind shear. The collapse of the left main landing gear was a direct consequence of the uncontrolled ground loop.
Safety message
Pilots should be cautious when managing power settings during crosswind landings, particularly if unexpected aerodynamic disturbances occur. Maintaining directional control is critical, and abrupt power reductions can sometimes worsen yawing tendencies rather than correct them.