Casualties unknown

1998-07-27: Stinson 108-1 (N483C) — Bloomington, IN

Bloomington, IN, US

On July 27, 1998, a Stinson 108-1 (registration N483C) was involved in an aviation accident near Bloomington, IN. Investigators recorded the probable cause as: A loss of engine power due to a fractured number 5 and number 6 cylinder connecting rods for undetermined reasons. This summary draws on records from the U.S. National Transportation Safety Board (NTSB) historical archive.

Sourcesthe U.S. National Transportation Safety Board (NTSB) historical archivePrimary reportUpdated 1781061362Data APIEditorial standards
Aircraft registered N483C
Aircraft registered N483C. Photo: Bill Larkins / CC BY-SA 2.0, via Wikimedia Commons

While cruising at 4,500 feet, a pilot experienced excessive vibration and zero oil pressure, shut down the engine, and executed a forced landing. The aircraft struck a guard rail and caught fire; the pilot and passenger evacuated before the fire.

Accident Details

The airplane was cruising at 4,500 feet mean sea level approximately 15 miles north of Bloomington, Indiana, when it began to vibrate excessively. The pilot observed that the oil pressure gauge indicated zero pressure. In response, the pilot shut down the engine and initiated a forced landing to a field.

As the airplane began to settle, the pilot noticed a guard rail adjacent to a road ahead. Attempting to clear the rail, the pilot pulled back on the controls, but the aircraft lacked sufficient airspeed to overcome the obstacle. The airplane struck the guard rail and came to a stop. The pilot and passenger exited the airplane before it caught fire and was engulfed in flames.

Engine Examination

Subsequent examination of the engine revealed that the connecting rods for cylinders number 5 and 6 were broken. A hole measuring six inches by four inches was found in the top of the engine crankcase, located above the number 5 and number 6 cylinders. The damage was consistent with a catastrophic internal engine failure.

Investigation report by the U.S. National Transportation Safety Board (NTSB) historical archive. Original record: https://carol.ntsb.gov/event/20001211X10527. This page is a structured re-presentation; facts and quotes are in the National Transportation Safety Board (NTSB), United States.