Terrain impact during night positioning flight

1 fatality • Chuathbaluk, United States of America • Landing (descent or approach)

A positioning flight ended in a terrain impact after the aircraft encountered a sudden snow squall and reduced visibility during its approach.

What happened

During a night positioning flight under marginal visual meteorological conditions, an aircraft departed for its destination. According to a witness at the arrival airport, the airport lighting had recently been activated when a sudden snow squall moved across the airfield, significantly degrading visibility. The aircraft failed to arrive at the intended airport, prompting the commencement of a search operation.

Search teams located the fragmented wreckage in a wooded area approximately 2 miles from the destination the following morning. Analysis of ADS-B data indicated that after departure, the aircraft climbed to an altitude of roughly 700 feet above ground level. The aircraft maintained this altitude for approximately three minutes before entering a shallow right-hand descending turn that resulted in the terrain impact.

Findings

An investigation of the engine and various recovered components revealed no mechanical anomalies or malfunctions that would have prevented the aircraft from operating normally. However, the extreme fragmentation of the cockpit area made it impossible to rely on findings from the instruments or cockpit interior. Additionally, the structural damage to the airframe prevented investigators from confirming the continuity of the flight controls.

Based on the reported weather changes and the lack of mechanical failure, it is believed the pilot encountered heavy snow and instrument meteorological conditions while approaching the airport. The evidence suggests the pilot likely experienced spatial disorientation due to the unexpected weather encounter, leading to the collision with the ground.

Probable cause

The pilot likely encountered unexpected heavy snow and instrument meteorological conditions, leading to spatial disorientation and subsequent terrain impact.

Frequently asked questions

What happened in the 2011-11-29 Cessna 207 Skywagon/Stationair accident near Chuathbaluk, United States of America?

A positioning flight ended in a terrain impact after the aircraft encountered a sudden snow squall and reduced visibility during its approach.

Were there any fatalities in the 2011-11-29 Cessna 207 Skywagon/Stationair accident?

The accident was fatal, resulting in 1 fatality.

What aircraft was involved and where did it happen?

The accident on 2011-11-29 involved a Cessna 207 Skywagon/Stationair, registration N1673U, operated by Inland Aviation Services, at Chuathbaluk, United States of America.

What was the probable cause of the accident?

The pilot likely encountered unexpected heavy snow and instrument meteorological conditions, leading to spatial disorientation and subsequent terrain impact.

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