Amateur-built SEAREY N4031 accident near St. Paul, Minnesota

Probable cause

The pilot's delay in aborting the takeoff during the takeoff roll when he became aware of the engine not producing full power.

NTSB analysis

During takeoff, the engine never reached full power. While about 18 feet above the runway, the pilot attempted to land. During the attempt, the pilot initiated a steep bank turn in order to avoid an airport perimeter fence. Subsequently, the airplane impacted the ground and came to rest upright. Examination of the airplane revealed no anomalies that would have precluded normal operation. The engine was test run with a slave propeller and the engine developed normal power and RPM. The reason for the loss of partial engine power during takeoff could not be determined.

Text from the NTSB. Open the NTSB docket for CEN10LA064 for the full record.