Accident Sequence
The pilot took off and experienced an airspeed indicator failure. He diverted to another airport, where he removed mud from the pitot tube and refueled the airplane. He then departed with passengers to return to the original point of departure. While en route, the airspeed indicator failed again.
Landing and Nose-Over
The pilot reported that because the destination had a 50-foot obstacle on one end, he elected to land downwind. He described making a low and slow approach. Upon landing, he found he was too fast and applied full brakes on uneven terrain. The front wheel broke off, and he held the airplane up. When the front came down, the gear post dug into the strip and the aircraft flipped onto its back.
Examination
Examination of the airplane and the grass airstrip revealed that the airplane touched down on the first one-third of the runway. It bounced and touched down about 1,000 feet from the approach end of the runway. It then became airborne again, touched down 500 feet later, and the nose wheel dug into the dirt, causing the airplane to nose over.