Cessna U206G N9420R accident near La Verne, California

Probable cause

The pilot's loss of directional control during the landing roll for reasons that could not be determined, because postaccident examination of the nosewheel assembly revealed no anomalies that would have precluded normal operation.

NTSB analysis

The private pilot reported that, during landing, he had difficulty controlling the airplane after the nosewheel settled onto the runway. The pilot stated that the airplane initially veered to the left; however, he was able to correct its track. The airplane then veered left a second time, he was unable to regain control, and the airplane subsequently exited the runway surface. During the accident sequence, the right wing struck the ground.

Postaccident examination of the airplane revealed a deflated nosewheel oleo strut; however, the investigation was unable to determine whether the strut became deflated before or during the accident sequence. The airplane displayed proper nosewheel steering when weight was applied on the nosewheel strut. No further anomalies were noted with the airplane's nosewheel steering, nosewheel assembly, braking system, or tires; thus, the reason for the loss of control could not be determined.

Text from the NTSB. Open the NTSB docket for WPR15LA042 for the full record.