The main body of the helicopter which ditched into the North Sea with 18 people on board has been returned to dry land.
Accident investigators said on Sunday that the fuselage was brought back to Aberdeen by boat on Saturday night.
The vessel carrying the wreckage docked at around 10.30pm on Saturday night, and the unloading operation took a further four hours.
It was recovered from the water and will now be taken to the Air Accidents Investigation Branch (AAIB) facility in Farnborough.
Sixteen passengers and two crew had to be rescued after the Super Puma helicopter ditched near a BP installation around 125 miles east of Aberdeen on Wednesday night.
An AAIB spokeswoman said: "I can confirm that the vessel carrying the fuselage has now docked in Aberdeen, and will now be transported to Farnborough for investigations to begin."
A spokesman for operator Bond Offshore said: "The successful recovery of the fuselage is excellent news and it will greatly assist the AAIB in identifying the cause of the incident."
Aviation writer Jim Ferguson said: "The tail boom has come off a great deal further forward than I had thought and had been told, which suggests there had been a fairly serious impact of something to take it off.
"The main rotor blade is a fairly hard structure to break. We do not know when that damage was sustained.
"It is very interesting indeed."
Workers on the BP installation raised the alarm after they saw the aircraft hit the water around 550 yards from the Etap oil and gas production platform.
After the alarm was raised at around 6.40pm on Wednesday a major rescue operation was launched involving an RAF Nimrod, RAF Sea King, civilian aircraft and boats.
The 18 people on the Super Puma helicopter escaped on to rubber liferafts and waited for help to arrive.
Three were eventually winched to safety by a Bond rescue helicopter which arrived 40 minutes after the accident, while the other 15 were later recovered by a platform lifeboat and transferred to the Caledonia Victory which made for Aberdeen.
BP suspended using Super Puma helicopters from Bond for North Sea flights on Thursday.
The company said it had decided to temporarily stop using that type of helicopter on flights from Aberdeen "as a precaution".
A spokesman for Bond said that, after the ditching of the EC225 helicopter, its other two helicopters of that type were checked on Thursday and remained operational.
CRASH AT SEA - EXTRA
Extended interview with crash survivor Finlay McGregor
North Sea has history of flight accidents
Interview with RAF Kinloss Squadron Leader Barry Neilson
Interview with experienced helicopter pilot Quentin Mayberry
RAF footage of nighttime scene in the North Sea
