Accident Overview
An aircraft operating under instrument flight rules (IFR) impacted rising terrain at the 1860-foot level during instrument meteorological conditions (IMC). The aircraft was reportedly cleared to fly 'VFR on top' or at 3000 feet or above en route to Portland. The pilot was off course for the destination when the aircraft struck Mt. Blyn.
Flight Details
The aircraft was conducting an IFR flight and encountered IMC conditions. According to the flight plan, the pilot intended to operate either under visual flight rules (VFR) on top or IFR at an altitude of 3000 feet or higher. However, the aircraft deviated from the planned course and impacted terrain.
Wreckage and Site Conditions
At the accident site, the aircraft's trim was found set for 'nose left.' However, the area was not secured before being vandalized; parts were missing and suspected of being stolen. The wreckage was subjected to approximately 24 hours of fire and some post-impact explosions, as evidenced by molten metal blasted against the sides of nearby trees. The aircraft impacted trees and the ground on an upslope that was obscured by clouds, according to residents who heard the aircraft and the subsequent explosion.
Investigation Delay
The investigation was delayed from May until October due to state restrictions related to the danger of forest fires in the area.