EC225 crash near Bergen, Norway April 2016

[AW009]

@Mitchaa, @Birmingham:

According to Airbus Helicopters’ analysis, seven potential initial events have been retained to explain the main rotor detachment of LN-OJF. Out of these seven scenarios, only one – the failure of the attachment of a suspension bar – can been assessed as probable by Airbus Helicopters, based on the information available to date.
At this stage, the exact cause of this possible event is still unknown. Analysis of the helicopter’s maintenance history has just started and should provide a better understanding of the most likely causes.
Source: Norway-Statement - Airbus Helicopters

Certainly this is not a wise and diplomatic statement by AIRBUS.

The Accident Investigation Board Norway, or AIBN, said failure of the housing of the main gearbox, a gear called the epicyclic module and a suspension bar that attaches the rotor to the airframe are being considered as possible causes for the April 29 crash.
Source: Correction to Norwegian Helicopter Crash Investigation Story - NASDAQ.com

So AIBN avoids in present and still unsufficant body of evidence any anticipated verdict on sb./sth. and this evenhandedness is most expedient.