Accident Overview
During the takeoff climb, the aircraft ascended to an altitude of 50 to 150 feet above the runway when the engine began running roughly and losing power. The pilot was unable to maintain altitude and elected to perform a forced landing on a road. During the landing roll, the aircraft's wing struck a bridge, causing the aircraft to overturn.
Maintenance History
According to the engine log, the right magneto points and distributor block were replaced, and both magnetos were retimed on July 14, 1981, at 4,329 total airframe hours. No evidence of inspections was found for the eight years and 1,233 operational hours preceding the accident.
Post-Accident Examination
A post-accident engine test revealed that the right magneto failed after operating for 10 minutes. Examination of the right magneto coil showed evidence of arcing.
Conclusion
No official probable cause was stated in the source. The investigation documented the maintenance history and post-accindent findings of magneto failure.