Overview
A helicopter engaged in external load operations was orbiting east of a logging pickup site when the sling load contacted trees and terrain near a ridge. Weather conditions at the time were clear with light winds.
Sequence of Events
During the operation, the helicopter was observed shaking and oscillating, followed by a flat spin. The sling line remained visibly attached throughout the incident. A radio call inquiring about the situation received no reply.
Findings
Upon reaching the accident site, first responders found the belly hook and line still engaged. Evidence of freshly broken tree limbs and branches was discovered along the flight path. Deposits of woody debris were noted on sections of the lines and load. No discrepancies were found with the belly hook.
No further details have been released regarding the aircraft or occupants.