File photo dated 25/08/13 of wreckage of the Super Puma L2 helicopter which went down in the North Sea with the loss of four lives , around two miles west of Sumburgh airport on Shetland as it was ... more 
File photo dated 25/08/13 of wreckage of the Super Puma L2 helicopter which went down in the North Sea with the loss of four lives , around two miles west of Sumburgh airport on Shetland as it was returning to the island from the Borgsten Dolphin platform, as an investigation into the crash has so far found no evidence of technical failure. less 
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Press Association Images
Thu, Sep 5, 2013 10:10 AM EDT