On June 24, 1998, a Hiller UH-12E (registration N86663) was involved in an aviation accident near Park Rapids, MN. Investigators recorded the probable cause as: Loss of control during initial climb due to wind gusts and turbulence surrounding nearby buildings in a congested area. This summary draws on records from the U.S. National Transportation Safety Board (NTSB) historical archive.
A pilot lost control of a helicopter during initial climb in a congested area, citing wind gusts and turbulence near buildings as contributing factors to the accident.
What happened
The accident occurred during the takeoff phase in an area described by the pilot as congested or semi-confined. According to the pilot's statement, the environment presented significant challenges due to the proximity of nearby structures. As the helicopter began its initial climb, it experienced a loss of control. The aircraft pitched downward and rolled to the left before impacting the terrain.
The investigation
The primary basis for understanding the sequence of events comes from the pilot's report. No mechanical examination or physical evidence analysis is detailed in the provided source text regarding the helicopter's condition prior to the incident.
Probable cause
Loss of control during initial climb due to wind gusts and turbulence surrounding nearby buildings in a congested area.