On June 25, 1999, at 1205 central daylight time, a Cessna 150G, N2263J, owned and piloted by a private pilot, sustained substantial damage after a loss of control and subsequent nose over during a landing on Runway 17 (4,400 feet by 75 feet, dry/asphalt) at the Fort Scott Municipal Airport, Fort Scott, Kansas. Visual meteorological conditions prevailed at the time of the accident. The personal flight was operating under the provisions of 14 CFR Part 91 and was not on a flight plan. The pilot and one passenger reported no injuries. The flight departed Butler Memorial Airport, Butler, Missouri, at 1130. According to the pilot's written statement, on landing rollout the airplane veered to the left side of the runway. The pilot reported that the airplane departed the runway surface, the tires sunk into soft turf on the side of the runway, and the airplane nosed over coming to rest in an inverted position. Inspection of the runway surface revealed a single tire skid mark that initiated approximately 240 feet from the runway threshold, 10 feet left of the runway centerline, and followed a left curved path terminating approximately 465 feet from the runway threshold, 20 feet left of the runway edge. The tire skid mark was approximated 225 feet long. Federal Aviation Administration (FAA) inspection of the wreckage revealed no mechanical anomalies with the aircraft's control and the brake systems. Both main landing gear wheels were free moving and the brake system was exercised and operated without any anomalous behavior.