in answer to the questions about the engines.
the damage on the fan blades is not consistant with a blade failure. i have lots of pics to compare against, unfortunately cannot share. IP reasons
if you watch the A380 blade off test on utube around 4:50 you will see the damage being done to the tips of the blades, not very detailed but best there is out there. i was hiding when they filmed that.
damage is ground impact damage.