Probable cause
A loss of engine power for undetermined reasons.
NTSB analysis
The pilot reported that after he was established on the downwind leg for landing the engine experienced a partial loss of power, followed by a total power loss after turning into the base leg. The pilot subsequently made an emergency descent and forced landing to an open field. The airplane hit a fence and nosed over, sustaining substantial damage to both wings. A Federal Aviation Administration inspector reported that an examination of the airframe and engine revealed no anomalies that would have precluded normal operation. Atmospheric conditions at the time of the accident were not conducive to the formation of carburetor ice. The reason for the reported loss of engine power could not be determined.
Text from the NTSB. Open the NTSB docket for WPR10LA087 for the full record.
Event
- Date
- Dec 17, 2009
- Type
- Accident
- Place
- Corona, California
- Nearest airport
- Corona Municipal (AJO)
- Highest injury
- Minor
- Minor injuries
- 1
- Weather
- Visual (VMC)
- Light
- Day
Cessna 172F
- N-number
- N8520U
- Category
- Airplane
- Damage
- Substantial
- Operating rule
- Part 91 (general aviation)
- Purpose of flight
- Personal
From the NTSB aviation accident database: N-registered aircraft, events since 2008, data through Oct 28, 2026. The file is published monthly, so the latest weeks are incomplete and recent records can change. The official source is the NTSB aviation investigation search. CheckAero is independent and not affiliated with the NTSB.