Three of four Shetland Super Puma crash victims drowned 17 December 2013 Last updated at 06:27 Three of the four victims of the Super Puma helicopter crash off Shetland drowned, BBC Scotland has learned. Death certificates show this was the cause of death for Sarah Darnley, 45, from Elgin, Duncan Munro, 46, from Bishop Auckland, and George Allison, 57, from Winchester. Gary McCrossan, 59, from Inverness, suffered heart failure. The latest Air Accidents Investigation Branch (AAIB) report said August's crash was "survivable." There were 18 people on board the helicopter at the time. The investigation into to the crash is ongoing.