On November 6, 2004, at 1145 central standard time, a homebuilt Jabat, Inc., Avid Flyer, N90JW, collided with trees while making an off airport forced landing in Cleveland, Missouri. The pilot was not injured. The airplane was substantially damaged. The 14 CFR Part 91 personal flight was operating in visual meteorological conditions without a flight plan. The flight originated from a private airstrip in Cleveland, Missouri, at 1105. The pilot reported that a malfunction occurred on the right wing while he was flying at 1,000 feet above mean sea level. He stated the airplane entered a right descending spiral. The airplane descended into a field about 2 miles away from his departure airstrip. The pilot stated the airplane contacted the ground then slid into trees, damaging the right wing. A post accident examination of the airplane was conducted by an inspector from the Federal Aviation Administration Flight Standards District Office in Kansas City, Missouri. The inspector reported that it appeared as if the fabric on the right wing had separated from the ribs. No other failures/malfunctions with the wing were noted. The pilot reported the fabric is glued to 1-inch rib caps in the wings. He also reported that it appeared as if the fabric had pulled away from the caps. The airplane was constructed in 1985 and it had been flown about 300 hours prior to the accident. The pilot reported the last annual inspection of the airplane was in April, 2004, and the airplane had been flown 4 hours since that inspection.