There is no way this is mechanical or feedback-related. The sounds are just too varied. There's a point where the guy clearly says "raargh".
It's obviously someone messing around. I assume AA claimed it's a glitch because PR doesn't want stories going around about how their planes are hackable, but it just makes them sound untrustworthy.
It's obviously someone messing around. I assume AA claimed it's a glitch because PR doesn't want stories going around about how their planes are hackable, but it just makes them sound untrustworthy.