Norway’s SHT air accident investigation board is to resume its search for missing components from the Airbus Helicopters H225 which crashed near Bergen on 29 April.
In a statement, SHT says the main focus of its search will be “for parts connected to the main gearbox”, and that this will “continue as long as required”.
Preliminary information contained in an emergency airworthiness directive issued by the European Aviation Safety Agency on 3 May suggested “in-flight separation of the main rotor hub from the main gearbox”.
Investigators had previously ruled out pilot error as a cause.
SHT adds that components so far retrieved have been moved to its facilities in Lillestrøm, where they arrived on 5 May.
"Here, the [SHT] will continue its efforts to sort and analyse both components and other information,” it says.
Thirteen passengers and crew died in the accident, when the CHC Helikopter Service-operated Super Puma (LN-OJF) came down near Turøy following a flight from an oil platform.