The airplane was damaged during a hard landing on runway 28. The pilot reported that the landing approach was normal. He reported that at touchdown on the main landing gear, wind gusts changed and caused the airplane to bounce off of the nose gear. The pilot attempted to settle the airplane back on the main gear, but it bounced higher and continued bouncing at least three more times veering to the left and in the grass. The weather reporting station located at the accident airport recorded the wind as 330 degrees at 6 knots. No gusts were recorded.