Roger_Mullins
They can “hack” the intercom, but don’t worry they can’t “hack” the computerized flight control system, system, system, system, system.
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They can “hack” the intercom, but don’t worry they can’t “hack” the computerized flight control system, system, system, system, system.
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Just another day at the funny farm we call the airlines. 
“We’re all about safety (but not cyber security 'cause hacking into the coms can’t possibly mean other blackbox systems are compromised…)” says AAL and the FAA.
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One can only imagine the “harmless fun” someone could have piping embarrassing sounds and conversations throughout a commercial flight. The problem is what other systems could be hacked?
I suppose noone thought of pulling the circuit breaker?
OK … we know what happened … NOW I wanna know what ways there are to hack into that system. It’s not a WiFi or bluetooth type system so … what ways are there to hack into it. Is that system digital or is it analog? Someone didn’t hold a cell phone close to a wire and breathe heavy. And airliners are full enough that if someone were somehow transmitting aboard the aircraft, there’d likely be a witness. This is an ‘inside’ job by someone who knows how that system works and wanted to play a prank. Once they know how they got in, they know how to secure it.
And who is this guy in the video … HE doesn’t seem very surprised and – in fact – seems pleasantly amused. Did they determine HE isn’t somehow involved.
Meanwhile, all the kinky people will be flying American now … 
AND … the bad boys have a new idea to spoil our flying days. I’ve heard it all, now.
Bear in mind that Boeing uses an OS provided by a nearby software creator. So if your computer can be hacked…
Kudos to Larry S. for an intelligent analysis. Subscribed.
Since ADS-B is unauthenticated and unencrypted, the PA system is the least of your worries.