If in doubt why not ask ground , Confirm line up and wait after the landing Atlas 747! ACMI does this all over the world is this the first time you seen this?
Fake call signs?
How long have you been in this position?
The thread was for an engine failure.

I agree with Earl, what the blazes has this got to do with an engine failure, and who the blazes are you lot to second guess the captain of the aircraft!.......suggest you wait until all the info emerges