Landing Sequence
The airplane touched down on runway 25R and immediately began to porpoise, with each oscillation increasing in amplitude. During the porpoising, the nose gear collapsed. The airplane then veered off the runway and nosed over.
Pilot Report
The pilot stated that after a normal approach and touchdown, the nose gear collapsed and the airplane veered off the runway and nosed over.
Witness Observation
A certified flight instructor, positioned behind and above the accident airplane in the traffic pattern, reported observing the accident sequence. He noted that the accident airplane appeared fast and was not on a stabilized approach. After touchdown, the airplane began to porpoise, with each oscillation growing larger.
Mechanical Inspection
A mechanic examined the airplane and stated that there was no evidence of preimpact mechanical malfunctions or failures. The mechanic indicated that the airplane appeared to have sustained a hard landing.