Casualties unknown

Pilot forced to make emergency landing in corn field after engine failure (N6490L)

Carbondale, IL, US

On September 14, 1986, a Cessna 152II (registration N6490L) was involved in an aviation accident near Carbondale, IL. Investigators recorded the probable cause as: An unexplained loss of engine power during flight, despite the application of carburetor heat, which resulted in an emergency landing and subsequent nosedown impact. No mechanical defects were found during post-accident inspection. 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 2026-06-22Data APIEditorial standards
Aircraft registered N6490L
Aircraft registered N6490L. Photo: ZLEA / CC BY-SA 4.0, via Wikimedia Commons

A pilot experienced an unexplained engine power loss while returning to the airport. Despite applying carburetor heat, the aircraft landed hard in a field and nosed over.

What happened

The pilot was operating the aircraft on a flight back to the departure airport when the engine suddenly sputtered. The engine revolutions per minute (RPM) dropped to a very low level, indicating a significant loss of power. In response to the emergency, the pilot immediately applied carburetor heat in an attempt to restore normal engine operation. However, the application of heat produced no change in the engine's performance.

With the engine unable to sustain flight, the pilot was forced to execute an emergency landing in an adjacent corn field. The impact caused the aircraft to nosed over upon touchdown. Following the accident, a thorough operational check was conducted on the aircraft. This inspection revealed no mechanical problems or defects that could explain the sudden loss of power during the flight.

The investigation

Investigators examined the aircraft following the incident to determine the cause of the engine failure. An operational check was performed to verify the mechanical condition of the engine and its systems. The results of this check showed that there were no mechanical problems found with the aircraft's hardware.

Probable cause

An unexplained loss of engine power during flight, despite the application of carburetor heat, which resulted in an emergency landing and subsequent nosedown impact. No mechanical defects were found during post-accident inspection.

Frequently asked questions

What happened in the 14 Sept 1986 Cessna 152II accident near Carbondale, IL?

A pilot experienced an unexplained engine power loss while returning to the airport. Despite applying carburetor heat, the aircraft landed hard in a field and nosed over.

What aircraft was involved and where did it happen?

The accident on 14 Sept 1986 involved a Cessna 152II, registration N6490L, at Carbondale, IL.

What was the probable cause of the accident?

An unexplained loss of engine power during flight, despite the application of carburetor heat, which resulted in an emergency landing and subsequent nosedown impact. No mechanical defects were found during post-accident inspection.

Investigation report by the U.S. National Transportation Safety Board (NTSB) historical archive. Original record: https://carol.ntsb.gov/event/20001213X34746. This page is a structured re-presentation; facts and quotes are in the National Transportation Safety Board (NTSB), United States.