CNNW CNN Newsroom With Fredricka Whitfield May 21, 2016
Acars signal. It sends signals to the ground of how the aircraft is functioning. At cruising attitude of 37,000 feet, the system started sending signals that something was wrong. The acars system sends four key signals, the first one, that copilots window recorded a higher than usual heat. Number two, within 1 second, difference the electronic bay or avionics bay, which is located right below the pilots, the Smoke Detector went off. Also at the same time, the forward lavatory Smoke Detector went off and then here is the key, the flight director system, the fmf went completely dead and the airc...