Landing and Accident Sequence
During a flight, the pilot decided to execute a touch-and-go landing on Lake Wentworth. The lake was described as calm. The pilot entered a downwind leg and completed the manufacturer's checklist. While turning onto the base leg, the pilot again referenced the checklist. On final approach, the pilot visually checked the landing gear, flaps, trim, propeller, and mixture. The aircraft was trimmed for a glassy water landing.
Pilot Account
The pilot reported hearing the keel contact the water with a sharp slicing sound, followed by a loud roar. The next recollection was looking up from the bottom of the lake. Upon surfacing, the pilot observed the aircraft in pieces. Two men and a woman in a boat shortly picked up the pilot. The pilot stated no mechanical malfunction occurred.
Aircraft Damage
The nose of the aircraft was totally destroyed and remained attached to the main fuselage only by hydraulic lines and electrical wiring. The fuselage longerons were bent upward. The tail section was bent upward and forward. The leading edges of the vertical and right horizontal stabilizers exhibited several propeller cut marks.
Examination
Post-accident examination of the aircraft revealed no evidence of mechanical malfunction.