. >> so both trance pop dsponderso and the plane would still fly for an hour and ten minutes?> it would sustain itself up the final bat theorteries ran o. so the fact it went on a straight course, it wasn't bobbing, it went straight where they thought they were going home. >> how unusual is this? >> extremely. there were five power sources on the way to these batteries and they would have to all fail. i've never heard of it in my career. you ask isn't there one more thing. we haven't ever needed one more thing. >> boeing 777 is one of the most sophisticated aircraft in the world. >> as good as it gets. one of the best ever made. >> all those redundant systems would have to go out at the same time. >> and there is a possibility of com ben nation problems. we could have a combination of prop problems and missteps by the pilot. a million different combinations that could produce this result. but i believe it was a pilot returning home with a seriously disabled airplane is why they ended up why wr there they did. >> and this notion it's being tracked by malaysian air force radar,