Casualties unknown

Pilot forced to road landing after engine roughness (N6328D)

Big Pine Key, FL, US

On April 9, 1987, a Cessna 172N (registration N6328D) operated by Savco Flying was involved in an aviation accident near Big Pine Key, FL. Investigators recorded the probable cause as: The engine running rough during cruise flight, which led to an emergency road landing and subsequent collision with street signs, with no pre-impact mechanical failure found. This summary draws on records from the U.S. National Transportation Safety Board (NTSB) historical archive; 3 related events involving the same aircraft type or operator are linked below.

Sourcesthe U.S. National Transportation Safety Board (NTSB) historical archivePrimary reportUpdated 2026-06-22Data APIEditorial standards

An aircraft experienced engine roughness during cruise flight, forcing the pilot to execute an emergency landing on a road where both wings struck street signs.

What happened

During cruise flight, the pilot reported that the engine began to run roughly. Despite attempting to resolve the mechanical issue without success, the aircraft was unable to maintain altitude. Consequently, the pilot elected to land the aircraft on a nearby road. While taxiing after the landing, both wings collided with street signs.

The investigation

A post-crash examination of the aircraft revealed no evidence of pre-impact failure or malfunction.

Probable cause

The engine running rough during cruise flight, which led to an emergency road landing and subsequent collision with street signs, with no pre-impact mechanical failure found.

All Cessna 172 accidents →

Frequently asked questions

What happened in the 9 Apr 1987 Cessna 172N accident near Big Pine Key, FL?

An aircraft experienced engine roughness during cruise flight, forcing the pilot to execute an emergency landing on a road where both wings struck street signs.

What aircraft was involved and where did it happen?

The accident on 9 Apr 1987 involved a Cessna 172N, registration N6328D, operated by Savco Flying, at Big Pine Key, FL.

What was the probable cause of the accident?

The engine running rough during cruise flight, which led to an emergency road landing and subsequent collision with street signs, with no pre-impact mechanical failure found.

Investigation report by the U.S. National Transportation Safety Board (NTSB) historical archive. Original record: https://carol.ntsb.gov/event/20001213X30751. This page is a structured re-presentation; facts and quotes are in the National Transportation Safety Board (NTSB), United States.