Aircraft impact during approach in low visibility

No fatalities • Sun Valley, United States of America • Landing (descent or approach)

An aircraft struck the ground while transitioning to an ILS final approach course during night operations in heavy fog.

What happened

While performing a transition from a DME arc to the ILS final approach course, the aircraft descended into the terrain prematurely. The incident occurred under challenging environmental conditions characterized by dark night visibility, fog, and low cloud ceilings. During this phase of flight, the aircraft's descent led to a collision with the ground.

All three occupants on board sustained injuries during the impact, with two individuals suffering serious harm.

Findings

Investigations into the accident revealed that there were no signs of mechanical failure or malfunction within the aircraft prior to the impact. Additionally, there was no evidence to suggest that the pilot had become incapacitated. While the specific reason for the uncontrolled descent could not be determined, investigators identified the premature descent by the pilot in command as a primary factor in the collision with the terrain.

Probable cause

The aircraft descended into the ground during an approach transition, though the exact reason for the descent remained undetermined.

Frequently asked questions

What happened in the 1986-12-06 Cessna 414 Chancellor accident near Sun Valley, United States of America?

An aircraft struck the ground while transitioning to an ILS final approach course during night operations in heavy fog.

Were there any fatalities in the 1986-12-06 Cessna 414 Chancellor accident?

No fatalities were recorded in this accident.

What aircraft was involved and where did it happen?

The accident on 1986-12-06 involved a Cessna 414 Chancellor, registration N37561, operated by Paul C. Van Alstyne, at Sun Valley, United States of America.

What was the probable cause of the accident?

The aircraft descended into the ground during an approach transition, though the exact reason for the descent remained undetermined.

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