Cessna T210 N6789R accident near Sapulpa, Oklahoma

Probable cause

The total loss of engine power due to the failure of the left magneto and subsequent damage to a lead for the right magneto.

NTSB analysis

Shortly after takeoff, the airplane’s engine lost total power and the pilot performed a forced landing to a road. During the forced landing, the pilot maneuvered to avoid a vehicle, and the airplane landed hard. The right main landing gear and nose landing gear collided with a concrete curb, and the nose landing gear collapsed. The airplane sustained substantial damage to the fuselage and left wing.

Examination of the engine revealed that the left magneto had overheated, failed, and separated from the engine, resulting in damage to the right magneto’s p-lead. The damage to the right magneto p-lead likely resulted in the grounding of the right magneto and a subsequent total loss of the engine’s ignition source.

Due to extensive damage to the left magneto, further testing could not be accomplished and the reason for its failure could not be determined. The magneto was recently rebuilt and installed on the engine before the flight. It could not be determined if this maintenance introduced debris to the internal magneto components.

Text from the NTSB. Open the NTSB docket for CEN24LA063 for the full record.