Heard from a Bristow engineer that they have been told that there "is no evidence of any mechanical problem with the aircraft".
The reason for this incident IS known - it is just being kept under wraps. WHY??????
After the EC225 CFIT last year there was the most radical look at night poor vis ops that I have ever seen. Maybe there are good lessons to be learnt from this incident, regardless of it's cause.
Come on Bristow - in the interest of Flight Safety and client confidence lift the veil of secrecy!