On July 17, 1988, a Cessna 177RG (registration N2059Q) operated by Airlake Aero, Inc. was involved in an aviation accident near Mankato, MN. Investigators recorded the probable cause as: a cracked propeller governor oil tube. This summary draws on records from the U.S. National Transportation Safety Board (NTSB) historical archive.
A pilot experienced oil pressure loss and oil on the windshield, leading to engine seizure and a forced landing in a bean field. The cause was a cracked propeller governor oil tube.
Incident Overview
During a routine flight, as the pilot leveled off at the intended cruise altitude, a loss of oil pressure was noted. Subsequently, oil spread up over the windshield, restricting visibility. The pilot initiated emergency procedures and began descending toward the nearest airport.
Emergency Descent and Forced Landing
While descending, the engine seized. Unable to reach the airport, the pilot descended through trees and executed a forced landing in a bean field approximately one-quarter mile from the airport.
Cause Determination
Investigation determined that the loss of oil was due to a cracked propeller governor oil tube, which allowed oil to be pumped overboard.