On January 20, 2008, at 1630 eastern standard time, a Cessna U206F, N8JZ, lost engine power while on downwind and made a forced landing in a wooded area at the Kissimmee Gateway Airport (ISM), Orlando, Florida. The airplane was substantially damaged, and the airline transport pilot, and two passengers were not injured. Visual meteorological conditions prevailed and no flight plan was filed for the personal flight. The airplane was registered to and operated by the airline transport pilot under the provisions of Title 14 Code of Federal Regulations Part 91. The flight originated from ISM at 1620. The pilot stated that he departed ISM with the intention of making a couple of "circuits" in the pattern. The first flight was uneventful and he made a full stop landing. During the second takeoff, as he turned from crosswind to downwind, the engine "failed." The pilot stated that he "switched the fuel selector to the other fuel tank, checked full mixture, full props and full throttle. He then checked left magneto, right magneto, both and start, aux fuel pump and emergency fuel pump." He said that at that point, engine power was not restored, and he made a "Mayday, Mayday" call before making a forced landing in a heavily wooded area. An airframe and powerplant mechanic, under the supervision of a Federal Aviation Administration (FAA) inspector, examined the airplane. During the examination the engine was started and run-up to 2,700 rpm for 15 minutes. A magneto check was conducted, and no anomalies were noted. The fuel selector was switched to each tank and no anomalies were noted.