On April 5, 1997, about 1030 eastern standard time, a Cessna 172M, N1385U, registered to the Crystal Aero Group, Inc., was substantially damaged on landing at the Tampa International Airport, Tampa, Florida. Visual meteorological conditions prevailed at the time and no flight plan was filed for the 14 CFR Part 91 personal flight. The private-rated pilot and pilot-rated passenger were not injured. The flight originated from the Crystal River Airport, Crystal River, Florida, about 1 hour earlier. The pilot was advised by the ATIS while inbound to land that the wind was from 150 degrees at 19 knots with gusts to 24 knots. The flight continued and was cleared to land on runway 18L. While over the runway threshold with the flaps fully extended, the airplane encountered a gust of wind. The pilot then relaxed the aileron control and the airplane rolled to the right, then ballooned, stalled, and impacted the ground nose and right wing low.