Procuring Cause, Duty of Care, and Holy Cheese.
Wiring is not expected to be protected from High Energy Debris: Airbus Exempt
Engine #1 damaged in the course of Emergency services protecting lives, See above, Procuring Cause. And RR will probably have to pay for the Fire Retardant used to damage its engine, as well.
The owners of the Engines, RR, Trent or Olympus have a chain of liability they will protect.
The Stub Pipe? A Toss up, to be divided between the manufacturer and the numpty who passed it to the line. OR, if Wear, and not a defect, LuftHansa needs to pay attention, if not damages.
The last one holding the Bag gets the "Shaft".
bear