NTSB Factual Report

On June 7, 2018 about 1645 central daylight time, a Beech A23 airplane, N8775M, registered to the pilot, sustained substantial damage following a runway excursion during landing rollout at the Sadalia Municipal Airport (DMO), Sadalia, Missouri. The private pilot and one passenger were not injured. Visual meteorological conditions prevailed and a flight plane was not filed. The personal flight was being conducted under the provisions of Federal Code of Regulations Part 91. The flight originated about 1600 from the Cape Girardeau Regional Airport (CGI), Cape Girardeau, Missouri.

The pilot reported that after 4 normal touch and go landings, he set up for another landing on runway 18. He stated that the AWOS reported winds from 100 degrees at 3 knots about 20 minutes prior to the landing. The pilot landed the airplane and the touchdown was soft. Suddenly, the airplane turned about 90-degrees to the left. The pilot applied right rudder and reduced the throttle to idle power. The airplane departed the runway surface, struck a runway light with the right horizontal stabilizer, and came to a stop. The right horizontal stabilizer sustained substantial damage. The pilot was able to taxi the airplane back onto the runway surface and return to the ramp. The pilot reported to the FAA inspector on-scene that the left brake had locked while braking on rollout.

A post-accident functional check of the braking system did not reveal any anomalies. Both left and right wheel brake mechanisms functioned properly when visually examined by an FAA inspector. A post accident weather review revealed that the reported wind conditions at DMO at 1640 were 230 degrees at 7 knots. Therefore, the approximate crosswind component would have been about 130 degrees opposite, and 4 knots increased, from what the pilot reported from his last weather update from AWOS.