Originally Posted by
Gjn290
I hope it isn't so, but sounds like must've blown up... terrorism. How else do you explain no mayday calls and losing contact/radar with a 777?
A whole lot of reasons. Fractures could have been expanding and this was the flight that did it in and the airplane broke up in flight, there could have been a suicidal pilot, or there could have even been confusion in the cockpit which led to a loss of situational awareness.