[andyk]

Why are the systems made available to the crew in such a way that they can be disabled? What’s the real world, legitimate reason for crew disabling these systems?

[FAA]

“What’s the real world, legitimate reason for crew disabling these systems?”

Electrical problems. Shorts. Fires.

You’d want to be able to shut them down in cases like this.

[ALPAPilot]

Why are the systems made available to the crew in such a way that they can be disabled? What’s the real world, legitimate reason for crew disabling these systems?<\i>

For the ACARS it gives us the ability to reset the system if it is not functioning propey. Similar to cntr-alt-del

[ProtectOurFreedom]

I’ve always heard it’s to be able kill the power so you can extinguish an electrical fire.