Cessna TU206G N4776U accident near Monument, Oregon

Probable cause

The loss of braking action during the landing roll on a gravel runway for reasons that could not be determined based on the available information.

NTSB analysis

The pilot stated that, after a 15-minute flight, he landed the airplane on a familiar, gravel runway at a slow groundspeed. Immediately thereafter, the airplane began to veer right, and the pilot used the brakes and aileron inputs in an effort to return to the runway center. Despite the pilot's attempts to regain directional control, the airplane continued off the right side of the runway, struck a ditch, and then came to rest inverted.

The pilot reported that the loss of directional control was precipitated by a landing gear malfunction and that a brake likely seized after touchdown. Although the brakes could not be operated with the pedals during postaccident examination of the braking system, it could not be determined whether this was a result of the accident and/or the subsequent recovery.

Text from the NTSB. Open the NTSB docket for WPR15LA022 for the full record.