investigation, there s no evidence one way or the other. but there would be piles of evidence if acars hadn t stopped transmitting. you d know the air condition of the engines, the route it was taking, the altitudes it was taking. we would know exactly the state of that aircraft. just the kind of information someone taking over a plane wouldn t want anyone to know. if you were doing something nefarious, then switching off acars would be a crucial part of making the plane go dark. the plane was dark and silent. there was still no check-in with vietnam air traffic call, a call former pilot nick huslon has made thousands of times. you have to be like a drunk