Primary finding
Probable cause
The pilot's improper decision to turn the airplane from the runway onto the taxiway at an excessive speed, which resulted in a loss of directional control, runway excursion, and collision with a taxiway sign.
Investigator assessment
Analysis narrative
According to the pilot, the air traffic tower controller requested that he "keep up the speed" and execute a "close approach" before landing. During the landing roll at night, the pilot attempted to exit the runway at an excessive speed, and the airplane "began to tilt to the right." He tried to steer the airplane back to the runway, but the airplane exited the runway and impacted a taxiway sign. The airplane sustained substantial damage to the left wing. The pilot reported that there were no preaccident mechanical malfunctions or failures with the airplane that would have precluded normal operation.
Source record
Factual narrative
According to the pilot, the tower controller requested he "keep up the speed" and to execute a "close approach" before the landing. During landing rollout at night, the pilot attempted to exit the runway at an excessive speed and the airplane "began to tilt to the right." He tried to steer the airplane back to the runway, but the airplane exited the runway and collided with a taxiway sign. The airplane sustained substantial damage to the left wing.