Bell 212 LN-OLK Accident on Adventfjorden Ice, Svalbard

Overview and Flight Details On 18 December 2003, a Bell 212 helicopter with registration LN-OLK, operated by Airlift AS, was involved in an accident on the ice of Adventfjorden in Svalbard. The aircraft was owned by Offshore Helicopters AS. The flight was a visual flight rules (VFR) mission to transport three passengers to an antenna facility on Hiorthfjellet, northeast of Longyearbyen. The helicopter departed Svalbard Longyear Airport at 08:18 local time and reached the landing area at 1,560 feet elevation in approximately three minutes. ## Accident Sequence After the passengers disembarked, the crew changed duties, and the co-pilot became the pilot flying for the return journey. The helicopter entered a hover and turned right to align with the airport lights. During the initial forward flight, the crew used the helicopter's lights reflecting on the snow for guidance. As the terrain disappeared into darkness, the co-pilot navigated using visual references from the airport. The commander initially noted a high rate of descent but became distracted by scanning for an expected conflicting aircraft. The helicopter impacted the ice approximately 80 seconds after takeoff, roughly halfway between the departure point and the airport. ## Impact and Rescue The helicopter struck the ice, bounced once, and slid approximately 100 meters before coming to rest in a hole in the ice. The main wreckage broke through the ice and sank to a depth of 70 to 80 meters. The sea temperature was -2°C and the air temperature was -24°C. Despite sustaining fractures and lacerations, both crew members escaped the water and reached safe ice before the aircraft sank completely. Emergency signals from the helicopter's emergency locator transmitter were received at 08:25. A rescue helicopter took off 35 minutes later and located the crew members on the ice at 09:07. Both were transported to a hospital. ## Investigation Findings The Norwegian Transport Safety Authority (SHT) concluded that the direct cause of the accident could not be determined with certainty. However, the investigation identified the 'black hole effect' (visual illusion) as a decisive factor. The crew deviated from the company's policy for night VFR flights, and procedures for this type of operation were insufficiently described in company documentation. Contributing factors included crew complacency, inadequate crew coordination, and possible temporary reduced alertness of the commander. The report also discussed conditions related to the helicopter's radio altimeter. ## Safety Recommendations The investigation resulted in two safety recommendations. One addressed the company's procedures for visual flight in darkness, and the other concerned air traffic service procedures for receiving emergency signals.