Would have been easier if the pilots had asked what wasn't damaged
Hub failure of some sort, tyre exited stage right at near light-speed, boing-boing, must have bounced somehow, flipped up, then took out 2x c-ducts on the #4. My guess is BER on the c-ducts. Engine itself was pretty lucky.
But of course this is only a rumour I heard from the guy that shines the shoes in Terminal 1......
Happy Flying,
N1 Vibes
