I have no idea about your last clue, Andrei. Not even with the knowledge of the answer of the overall riddle, let alone if I did not know it was about the 744.
What I did manage is to punch in a KATL KPAE flight (and back, just o be sure no-one ends up stranded there after the event). Made it a Class 6 flight, so pilots can choose from a wider variety. Will be 744 for now, of course, but after the event ...