Casualties unknown

Airplane Strikes Mountain Ridge During VFR Flight (N5738J)

Dunlap, TN, US

On April 20, 1991, a Cessna 172N (registration N5738J) operated by Imperial Fabricating Company was involved in an aviation accident near Dunlap, TN. Investigators recorded the probable cause as: THE PILOT-IN-COMMAND'S INADEQUATE PREFLIGHT PLANNING/PREPARATION, HIS ATTEMPTED VFR FLIGHT INTO IFR CONDITIONS, AND HIS SUBSEQUENT FAILURE TO MAINTAIN A PROPER ALTITUDE. This summary draws on records from the U.S. National Transportation Safety Board (NTSB) historical archive; 1 related events involving the same aircraft type or operator are linked below.

Sourcesthe U.S. National Transportation Safety Board (NTSB) historical archivePrimary reportUpdated 2026-07-04Data APIEditorial standards

An instrument-rated pilot and pilot-rated passenger flew into a mountain ridge while en route to a VFR-only airport. Low ceilings, light drizzle, and fog were reported near the destination. The airplane impacted in level flight, with no mechanical failure found.

Accident Details

The accident occurred during a personal flight to an airport designated for visual flight rules (VFR) operations only. The route required crossing a mountain ridge. Weather conditions near the destination included low ceilings, light drizzle, and fog. The pilot did not file a flight plan, did not activate one while en route, and had no voice communications with air traffic control.

Witness Accounts

Witnesses positioned atop the mountain ridge reported hearing the sound of an engine approaching until a crash was heard. One witness, who arrived first at the scene, noted that forward visibility on the ridge was approximately 75 yards.

Investigation Findings

Examination of the accident site revealed that the airplane struck the side of the ridge on a direct heading toward the destination airport. The damage pattern indicated a level flight path with wings level at the moment of impact. No evidence of mechanical failure or malfunction was discovered during the investigation.

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Frequently asked questions

What happened in the 20 Apr 1991 Cessna 172N accident near Dunlap, TN?

An instrument-rated pilot and pilot-rated passenger flew into a mountain ridge while en route to a VFR-only airport. Low ceilings, light drizzle, and fog were reported near the destination. The airplane impacted in level flight, with no mechanical failure found.

What aircraft was involved and where did it happen?

The accident on 20 Apr 1991 involved a Cessna 172N, registration N5738J, operated by Imperial Fabricating Company, at Dunlap, TN.

What was the probable cause of the accident?

THE PILOT-IN-COMMAND'S INADEQUATE PREFLIGHT PLANNING/PREPARATION, HIS ATTEMPTED VFR FLIGHT INTO IFR CONDITIONS, AND HIS SUBSEQUENT FAILURE TO MAINTAIN A PROPER ALTITUDE. FACTORS IN THE ACCIDENT WERE: THE MOUNTAINOUS TERRAIN, THE FOGGY, LOW CEILING CONDITIONS ALONG THE ROUTE OF FLIGHT.

Investigation report by the U.S. National Transportation Safety Board (NTSB) historical archive. Original record: https://carol.ntsb.gov/event/20001212X16720. This page is a structured re-presentation; facts and quotes are in the National Transportation Safety Board (NTSB), United States.