What happened
The pilot was conducting a landing operation at Oakland International Airport in California. The aircraft approached and touched down on runway 31 while encountering a left crosswind component. During the rollout, the aircraft departed the right side of the paved surface.
Upon leaving the runway environment, the aircraft entered a drainage ditch located adjacent to the airfield. The impact with the terrain caused the nose of the aircraft to pitch downward, resulting in a nosedown attitude. The pilot estimated the wind conditions at the time of landing were from 220 degrees at 10 knots.
Findings
Meteorological data from the official observation at Oakland, CA, indicated that the wind was from 200 degrees at 8 knots during the relevant period. The discrepancy between the pilot's estimate and the official report suggests varying local wind conditions or estimation error. The primary factor in the incident was the aircraft leaving the runway surface to the right.
The investigation confirmed that the Cessna sustained damage consistent with a nosedown impact into soft terrain. No other mechanical failures were reported as contributing factors. The event occurred during the landing phase of flight.