On June 15, 2002, at 1100 central daylight time, a Cessna R172K single-engine airplane, N758W, was substantially damaged during a forced landing following a loss of engine power during the initial takeoff climb from the Llano Municipal Airport, Llano, Texas. The airplane was registered to and operated by the pilot. The commercial pilot and his one passenger were not injured. Visual meteorological conditions prevailed, and a flight plan was not filed for the 14 Code of Federal Regulations Part 91 personal flight. The local flight originated from the Llano Municipal Airport at 1050. According to the pilot, he performed a pre-flight inspection and noted that the left fuel tank's gauge indicated empty and the right fuel tank's gauge indicated 1/3 to 1/2 full. He started the airplane, taxied to runway 17 for takeoff, and performed an engine run-up. No anomalies were noted during the engine run-up, and the flight departed. The flight remained in the pattern and the pilot executed a touch-and-go landing. During the initial takeoff climb, approximately 200 feet agl, the engine lost power. During the ensuing forced landing to a field, the pilot verified that the fuel selector was in the both position, the throttle and mixture controls were full forward, and that his passengers lap belt and shoulder harness were secure. The airplane landed in a mesquite covered field, the right wing struck a tree, the airplane pivoted 90 degrees and came to a stop upright. An FAA inspector examined the airplane at the accident site and reported that both wings' spars were damaged and the right wing's fuselage attach point was structurally damaged. He added that fuel was present in the fuel strainer and a one quart sample of fuel was drained from the airplane's main sump. The fuel sample was observed to be clear and free of contaminants. Both fuel tanks were drained; the left tank was empty and the right tank contained 2.1 gallons of fuel. According to the Pilot's Operating Handbook each wing tank is capable of holding 26 gallons of fuel. The fuel system's capacity is 52 gallons, of which 49 gallons are useable in all flight conditions and 3 gallons are unusable.