What happened
The pilot reported increasing power and airspeed while on final approach to compensate for strong winds and turbulence. Wind conditions were reported from 150 degrees at 18 knots, gusting to 28 knots. The aircraft crossed the threshold of runway 10 at an airspeed approximately 30 knots faster than normal. The pilot stated that the aircraft landed hard on the left main gear first and began to lean to the left. At some point, the left propeller struck the runway, causing sparks to fly. The pilot then pulled up the aircraft, retracted the gear, shut down both engines, and landed gear-up.
The investigation
An examination revealed that the tips of the left propeller had sheared off and penetrated the left tip tank. Additionally, the belly, gear doors, and landing gear were damaged.