Wreckage of a helicopter which crashed off Norway remains missing ten days after the accident which claimed 13 lives.

Iain Stuart, 41, from Laurencekirk in Aberdeenshire, was among those killed when the Super Puma went down near Bergen on April 29.

Air accident investigators believe a technical fault caused the crash, which happened when the helicopter’s rotor blades detached in mid-air.

The European Aviation Safety Agency has ordered checks on all EC225 Super Pumas before they are allowed to fly.

All the wreckage recovered so far has been taken to the Accident Investigation Board Norway’s (AIBN) base at Lillestøm.

An AIBN spokesman said: “The helicopter parts were transported on two trailers and arrived on Thursday morning.

“Here, the AIBN will continue its efforts to sort and analyse both components and other information.

“The main focus for the search is for parts connected to the main gearbox. The search will continue as long as required.”

The European Aviation Safety Agency (EASA) said it believes the helicopter’s blades came off when the main rotor hub detached from its gearbox.

It emerged after the crash that helicopter operator CHC had replaced parts on the chopper after a warning light a few days earlier.

Norwegian Civil Aviation Authority legal adviser Hege Aalstad said the helicopter had both its gearbox and rotor head replaced in the months before the crash.