[C210N]

I’m not buying the notion that a terrorist can hack into vital a/c systems via an internet link, especially one that provides entertainment to pax.

At the most, hacking could affect cockpit internet access, and could cripple passenger entertainment.

Aircraft flight systems ARE linked to an internet provider, but in one direction: supplying information. The internet provider has to know ground speed, lat/lon, and especially aircraft orientation so that it can keep its antenna pointed to internet-providing satellites. But, there is no path provided for the aircraft’s vital systems to get info from the internet.

[Red Badger]

But, there is no path provided for the aircraft’s vital systems to get info from the internet.

There is no path INTENTIONALLY provided for the aircraft’s vital systems to get info from the internet. Someone may have exploited a flaw in the system and provided that necessary link via their own computer system...................

[Myrddin]

You have multiple passengers on board with computers that have wired and wireless networking capability. The right inside knowledge might well provide all the linkage necessary.