On November 29, 1986, a Beech A23-24 (registration N5996S) was involved in an aviation accident near Vernal, UT. Investigators recorded the probable cause as: The pilot's decision to land on a dirt road with soft surface conditions, which resulted in a loss of control during the landing roll. This summary draws on records from the U.S. National Transportation Safety Board (NTSB) historical archive.
A pilot attempted to land on a dirt road near two oil rigs, making low passes to inspect the surface before the aircraft dug in and struck a gas pipeline.
What happened
The pilot initiated an attempt to land on a dirt road situated in close proximity to two operational oil rigs. Prior to touching down, the pilot conducted several low passes over the intended landing zone to visually assess the condition of the road surface.
During the subsequent landing roll, the aircraft's wheels penetrated the soft ground surface. This interaction caused an immediate loss of control. The aircraft departed the roadway, collided with a gas pipeline, and ultimately came to rest in a nearby ditch.
Probable cause
The pilot's decision to land on a dirt road with soft surface conditions, which resulted in a loss of control during the landing roll.