system. >> remember the timing this all happened. transitions from malaysian air space to vietnamese air space, no-man's land in the sky. >> to remind people how they disabled the system. it's a knob turn away. the acars, there's a lot of electronics under the cockpit in the passenger section. there are breakers in the cockpit right is this have mitchell show how simple that would be as well in terms of level of sophistication. >> acars is located in here, located in here, located in here and here. four systems independent here. you'd have to start shutting them down. you couldn't completely turn it off here. >> no. you couldn't completely unless you went down inside the bay below the aircraft in the guts of the airplane. you would have to have in-depth knowledge of the architecture of