Norway helicopter crashed caused by mechanical failure

The crash of a B.C.-owned helicopter that killed 13 people in Norway, Friday, was caused by a mechanical failure, said the the Norwegian accident investigation board, Tuesday.
The aircraft, an Airbus H225 Super Puma, was owned by CHC Helicopters, a company based in Richmond, B.C.
"We are as certain as we can be that a technical error caused the accident. We don't think it was due to human misinterpretations," said Kaare Halvorsen, the director of the board's aviation department.
The board told reporters Tuesday their probe and visual evidence, including video of the helicopter's rotor propelling into the sea moments before it crashed, indicated sudden mechanical failure.
It did not elaborate, saying a full investigation would take time.