What happened
During an agricultural application of liquid fungicide over a cranberry bog, the pilot was flying at 800 feet MSL when a loud bang was heard, immediately followed by a total loss of engine power. The pilot maneuvered the aircraft to prepare for a forced landing. After clearing several trees and dumping the remaining load of fungicide, the aircraft touched down in a furrowed cornfield. The impact resulted in substantial damage to the aircraft.
The investigation
An examination of the engine was conducted following the accident. Investigators discovered internal damage, specifically noting the galling of a bearing and the crankshaft bearing surface. An inspector from the Federal Aviation Administration determined that this galling was indicative of a lack of lubrication. However, the inspection did not identify any mechanical malfunction, leaks, or blockages within the lubrication system.