On May 31, 1988, a Grumman G-164A (registration N9653) operated by Hamilin Flying Service was involved in an aviation accident near Hickory Ridge, AR. Investigators recorded the probable cause as: The pilot's inability to maintain altitude during a standard aerial application turn around maneuver due to severe turbulence from dust devils. This summary draws on records from the U.S. National Transportation Safety Board (NTSB) historical archive.
During a standard aerial application turn around maneuver, the aircraft encountered severe turbulence from dust devils and settled into trees, resulting in destruction of the plane but no injuries to the pilot.
What happened
The incident occurred while the pilot was executing a standard procedure aerial application turn around maneuver. During this phase of flight, the aircraft began to settle unexpectedly. In an attempt to regain lift or reduce weight, the pilot dumped his remaining chemical load; however, the aircraft continued to descend. The plane ultimately mushed into the trees. A post-accident fire destroyed the aircraft, but the pilot escaped with no injuries. The pilot reported that there were numerous dust devils in the area and classified the turbulence as severe.
The investigation
Post-accident examination confirmed the destruction of the aircraft due to fire. No further mechanical findings are detailed in the source text.
Findings
The primary contributing factor was the severe turbulence caused by numerous dust devils in the area, which led to the loss of control and subsequent impact with trees.
Probable cause
The pilot's inability to maintain altitude during a standard aerial application turn around maneuver due to severe turbulence from dust devils.