I still beleive it was hijacked and then shot down by India or Malaysia . . .
So the engines continued to run for more than 7 hours after it was shot down. For those who have paid attention, Flight MH370’s Aircraft Communications Addressing and Reporting System, or ACARS, was disabled just as MH370 reached the eastern coast of Malaysia. However, it cannot be totally disabled. ACARS uses an active communication system that “pings” plane systems by satellite to see if they have updates—even if the data-transmission system is shut off. The ACARS system on the plane will still return the ping if it still has power. Flight 370 continued to send return handshakes to those pings for more than seven hours, which means that the flight was still in the air, or on the ground with its engines running.