Primary finding
Probable cause
The pilot's loss of directional control while landing in a strong quartering headwind, which resulted in a runway excursion and collision with an airport sign.
Investigator assessment
Analysis narrative
The pilot reported that the wind speed at the airport had increased significantly since his departure about 1 hour earlier. He stated that at touchdown, an unexpected strong wind gust lifted the right wing, and the left wingtip contacted the runway. The airplane subsequently veered to the left and collided with an airport sign, which resulted in substantial damage to the engine mount. The pilot reported that there were no preaccident mechanical malfunctions or failures with the airplane that would have precluded normal operation. The pilot was landing with a 20° right-quartering headwind at 12 knots.