Sorry this is a bit slow, I have been at work all weekend in the hangar at ARN.
The D Duct inner wall disintegrated on ratation. What you can see is glass fibre deris leaving the aircraft. The crew were advised by ATC. At 6000ft, the fan air stream pushed the exhaust nozzle into the core exit and the engine surged. The crew pulled it back to idle, but had no cockpit indications. The engine was left running at idle until it landed after dumping 60tons of fuel. The engine only suffered impact damage to the exhaust nozzle, a firewire and a oil scavenge pipe. Boroscopes OK. The left flaperon also suffered impact damage and is being changed.
We have changed the D duct., replaced blankets in the left D Duct, replaced the fire wire and the oil tube. We are awaiting a sling for the flaperon which comes from BA tomorrow morning.
All the spares came on a MH freighter which was rerouted to ARN.
Boeing Seattle and RR Derby have inspected the damage and concur that it was delamination, and no FOD or engine defect.
It has happened to the Trent 892 before and is the subject of an AD.