The accident occurred during a transition training instructional flight, and the pilot receiving instruction had not previously logged any flight experience in the accident airplane make and model. The pilot receiving instruction reported that on final approach they entered a side slip to align with the runway. The airplane was stable approaching the threshold but once past the threshold the airplane started to drift to the right of the centerline. The pilot called for a go-around and controls were passed to the flight instructor. The flight instructor stated that 20-30 feet above the runway the tail began to swing from left to right and he took control of the airplane. The airplane floated over the runway for a few seconds while he used the rudder to compensate for the unexpected gust of wind. The flight instructor stated that the airplane became difficult to control before one wing contacted the runway. The tail structure separated from the fuselage and the fuselage, engine mount, and both wings were substantially damaged. The flight instructor stated that there were no preimpact mechanical malfunctions or failures of the airplane that would have precluded normal operation.