Duncan
I believe the heli is nearly back at our engineers in Chester - it was recovered at lunchtime for its very unglamorous trip home on the back of a lorry.
We are obviously waiting for a full mechanical investigation but favourite at the moment is a major gearbox issue. No doubt we will be posting further on the subject when we know some more. It manifested itself with some very loud grinding sounds and airframe vibration.
The whole situation was handled extremely calmly by the two front-seaters but I am sure it is not a noise any of us would ever want to hear again.
Will keep you posted.
By the way - love the Hiller!!
Mike