On September 28, 1995, an Ercoupe (eng & Research Corp.) 415-D (registration N89331) was involved in an aviation accident near Belleville, IL. Investigators recorded the probable cause as: the rupture of the oil pressure line which led to oil system exhaustion, the stuck intake valves, and the powerlines. This summary draws on records from the U.S. National Transportation Safety Board (NTSB) historical archive.
An airplane experienced an abrupt engine power loss at 1,700 feet during cruise. The pilot attempted a forced landing to a corn field, but the landing gear caught powerlines, causing the aircraft to pitch down and slide to a stop after striking a road.
Event Description
During cruise at an altitude of 1,700 feet above ground level, the airplane's engine abruptly lost power. The pilot initiated a forced landing to a corn field. On approach, the landing gear of the airplane caught on powerlines, causing the aircraft to pitch down. The airplane subsequently struck a road and slid approximately 30 feet before coming to a stop.
Examination Findings
Post-accident examination of the wreckage revealed oil streaked down the right side of the fuselage, beginning just aft of the engine cowling. Inspection of the engine identified a rupture in an oil pressure line leading to the number 1 cylinder. Additionally, the number 1 and 2 intake valves were found stuck open due to a lack of lubrication.