The quality of the data from the flight and cockpit recorders that were sent to Britain for analysis was good, investigators said.
Police said they had identified the victims, who are all aged between 32 and 60 years old, but have not released all the names in accordance with the wishes of some of the families.
Victim: Iain Stuart
Police Scotland/PA
Iain Stuart, from Laurencekirk in Aberdeenshire, was among the victims flying from the North Sea Gullfaks B oil field, about 74 miles off the Norwegian coast, when it crashed.
After the accident, Norway's aviation agency banned all Airbus EC-225LP helicopters from flying in Norway or near Norwegian offshore facilities and the UK's Civil Aviation Authority grounded all commercial passenger flights using such helicopters except for search-and-rescue operations.
