What aircraft was involved and where did it happen?

The accident on 2003-12-18 involved a Bell 212, registration LN-OLK, at Adventfjorden, Svalbard, NO.

What was the probable cause of the accident?

The accident was driven by a visual illusion known as the 'black hole effect' during a night flight, compounded by a failure to follow instrument flight procedures and a lack of effective crew monitoring.

Visual Illusion Leads to Helicopter Crash on Svalbard Ice

A Bell 212 helicopter crashed into the ice of Adventfjorden during a night flight in the Arctic, resulting in the loss of the aircraft but the survival of both crew members.

What happened

On December 18, 2003, a Bell 212 helicopter, registration LN-OLK, operated by Airlift AS, crashed into the ice of Adventfjorden, Svalbard. The flight was a visual flight rules (VFR) mission intended to transport three passengers to an antenna station on Hiorthfjellet. The flight departed Svalbard Airport Longyear at 08:18 local time under conditions of total darkness and extreme Arctic temperatures of -24°C.

After dropping the passengers at the mountain plateau, the crew began the return leg. The co-pilot was acting as the pilot flying. During the flight, the crew utilized powerful external searchlights and landing lights to navigate. While the terrain was initially visible due to light reflecting off the snow, the ground surface eventually disappeared into darkness as they passed a steep mountain slope. During this period, the commander was focused on searching for another aircraft, LTR702, which was approaching the airport. Approximately 8 and 80 seconds after departure, the helicopter struck the ice of the fjord. The impact broke through the ice, and the aircraft slid approximately 100 meters before sinking to a depth of roughly 250 feet.

The investigation

The Norwegian Safety Investigation Authority (NSIA) examined the wreckage, though extreme environmental conditions and a muddy seabed prevented the recovery of the aircraft. The investigation focused on the flight's execution, the crew's adherence to company policy, and the environmental factors present during the Arctic night. Investigators also looked into the functionality of the helicopter's radio altimeter and the effectiveness of the airport's emergency response.

Findings

The primary contributing factor was the black hole effect, a visual illusion caused by flying in total darkness where the lack of visual references led to a loss of depth perception.
The crew failed to adhere to company policy regarding VFR operations at night; the flight was not conducted as an instrument flight.
There was evidence of crew complacency and a lack of effective crew coordination, characterized by a flat authority gradient where neither pilot took primary responsibility for monitoring the flight path.
The commander's attention was diverted by the attempt to visually locate another aircraft, which, combined with a potential reduction in the co-pilot's vigilance, contributed to the descent.
The company's written procedures for this type of operation were insufficient, lacking specific instructions for radio altimeter use and mandatory altitude call-outs.
Environmental factors, including light reflection from ice crystals and the blinding effect of searchlights on snow, likely obscured the approaching ice surface.

Safety action

The NSIA recommended that the operator develop comprehensive procedures for conducting VFR flights in darkness, specifically addressing instrument monitoring and altitude call-outs.
A recommendation was made to Avinor to establish formal procedures for handling emergency signals received via the Aerodrome Flight Information Service (AFIS) to ensure more efficient direction finding during distress situations.