On 23 August 2013, a Eurocopter AS332 Super Puma helicopter belonging to CHC Scotia crashed into the sea 2 nautical miles (3.7 km; 2.3 mi) from Sumburgh in the Shetland Islands, Scotland, while en route from the Borgsten Dolphin drilling rig.

[1] The helicopter was on an otherwise normal approach to Sumburgh Airport,[1] when at 18:17–18:20 local time, the aircraft lost contact with air traffic control.

Recovered flight data noted by the Air Accident Investigation Branch suggests that the helicopter engines remained powered until impact.

The manufacturer's initial analysis based on that data indicated that a combination of factors had placed the helicopter into a vortex ring state at low altitude which made impact "unavoidable".

On 5 September 2013, the Air Accidents Investigation Branch special bulletin reported that there is no evidence of a causal technical failure that could have led to the crash.