Casualties unknown

Agricultural Aircraft Collides with Trees During Emergency Landing (N6647Q)

Bristol, FL, US

On September 21, 1987, a Grumman G-164B (registration N6647Q) operated by Bobby W. Yon was involved in an aviation accident near Bristol, FL. Investigators recorded the probable cause as: The cause of the engine power loss could not be determined due to lack of evidence. 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

An agricultural aircraft lost engine power while spraying a field. The pilot attempted an emergency landing but struck trees before crashing.

What happened

The incident occurred while the pilot was operating an agricultural aircraft en route to spray a field. During the flight, the engine began experiencing a loss of power. Unable to maintain altitude, the pilot dumped the chemical load and prepared for an emergency landing. While attempting to reach an open field, the aircraft collided with 100-foot trees before crashing in the field.

The investigation

Examination of the wreckage revealed no mechanical defects that would have precluded normal operation. Inspectors found no reason for the loss of power during the flight.

Probable cause

The cause of the engine power loss could not be determined due to lack of evidence.

Frequently asked questions

What happened in the 21 Sept 1987 Grumman G-164B accident near Bristol, FL?

An agricultural aircraft lost engine power while spraying a field. The pilot attempted an emergency landing but struck trees before crashing.

What aircraft was involved and where did it happen?

The accident on 21 Sept 1987 involved a Grumman G-164B, registration N6647Q, operated by Bobby W. Yon, at Bristol, FL.

What was the probable cause of the accident?

The cause of the engine power loss could not be determined due to lack of evidence.

Investigation report by the U.S. National Transportation Safety Board (NTSB) historical archive. Original record: https://carol.ntsb.gov/event/20001213X32154. This page is a structured re-presentation; facts and quotes are in the National Transportation Safety Board (NTSB), United States.