On September 7, 2019, about 1000 central daylight time, a Champion 7KCAB airplane, N4136Y, impacted a tree during landing on runway 36 (3,000 ft by 75 ft, turf) at the Williams Flying Service Airport (6LA6), near Winnsboro, Louisiana. The commercial pilot and passenger reported no injuries. The airplane sustained substantial wing and fuselage damage. The airplane was registered to an individual and was operated by the pilot as a Title 14 Code of Federal Regulations Part 91 personal flight. Day visual meteorological conditions prevailed in the area about the time of the accident, and the flight was not operated on a flight plan. The local flight departed from 6LA6 about 0930. The pilot reported that during the landing touchdown on the runway the airplane bounced once followed by a "normal" touchdown on the main landing gear wheels. The airplane then veered left off the runway centerline. Right rudder was applied, and it had "no effect." The airplane slowed "considerably" and continued veering to the left after full right ruder was applied. The airplane subsequently impacted a tree where it sustained the substantial damage. The pilot reported that there were no airplane mechanical malfunctions. At 0953, the recorded nearby wind was 280° at 10 kts.