Shetland helicopter crash: Investigators search for black box
27 August 2013 Last updated at 22:24 BST
Air crash investigators are still searching for the black box flight data recorded from the helicopter which ditched off Shetland on Friday, killing four people.
The data recorder contains information vital in establishing what went wrong.
Oil industry leaders say the grounding of all Super Pumas could hit North Sea oil production.
Craig Anderson reports.