On May 27, 1984, a Hughes 369D (registration N5102Z) operated by Dr. L.l. Hyde was involved in an aviation accident near Kearney, NE. This summary draws on records from the U.S. National Transportation Safety Board (NTSB) historical archive.
A helicopter returning to the airport diverted to observe a friend's property along a river bank, experienced vibration in anti-torque pedals during a low-altitude turn, and entered a vertical descent, impacting a metal building.
Accident Details
While returning to the airport from a local flight, the pilot diverted to observe the property of a personal friend located along a river bank. While making a right turn at approximately 200 feet above ground level (AGL) and an airspeed of 40 to 50 knots, the pilot felt vibration in the anti-torque pedals. The helicopter then entered an upright, vertical descent, spinning about the vertical axis until it impacted through the roof of a metal storage building situated on the property.
Investigation Findings
An investigation revealed no mechanical failure or malfunction, except for a slight fluctuation in the free turbine governor and fuel control when the engine was test-run in its post-crash condition.
Environmental Conditions
The pilot of the medical rescue helicopter that responded to the scene reported difficulty controlling his aircraft in the vicinity of the crash due to turbulence and downdrafts associated with a 20-knot wind and dense forest along the river.