On July 6, 1984, a Grumman AA-5 (registration N9519L) was involved in an aviation accident near Woodstock, NY. Investigators recorded the probable cause as: The pilot's failure to maintain visual reference with the ground while flying in clouds and fog, which resulted in controlled flight into terrain. This summary draws on records from the U.S. National Transportation Safety Board (NTSB) historical archive.
An aircraft was observed flying through clouds and fog at tree-top level before the engine sound ceased. The plane subsequently crashed into a wooded area, cutting a path through the trees.
What happened
The aircraft was engaged in a visual flight rules personal flight when it encountered adverse weather conditions. A witness positioned on a mountain slope reported hearing the sounds of an approaching aircraft. Through the clouds and fog, the witness observed a brief glimpse of the aircraft's wheel and wing from approximately 100 feet away at tree-top level. A few seconds after this observation, the witness heard the engine sound cease.
The investigation
An examination of the crash site revealed that the aircraft cut a level swath through the trees during the impact sequence. This physical evidence confirmed the low-altitude trajectory and the nature of the collision with the forest canopy.
Probable cause
The pilot's failure to maintain visual reference with the ground while flying in clouds and fog, which resulted in controlled flight into terrain.