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.
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.