Insidea 777 News Today : Breaking News, Live Updates & Top Stories | Vimarsana

We're going to talk with an aviation reporter in australia monitoring the search effort. what his sources are telling him. he has serious questions about some of the copilot's signoff with air traffic controllers. as you've heard most other pilots we talked to say there's nothing unusual about it. plus inside a 777 simulator. exploring one of the new theories about what may have happened on board. trouble that may have been coming from the cargo hold. we'll tell you about what was in the cargo hold and how that may have played a role. one of the other aspects investigators are looking at. we'l...

About 25 square miles. that's not a lot of turf. so you would be burning out a team. these teams workday and night for weeks and months on end. and you're end up with a lot of burnout. so almost not worth just -- just be taking a shot in the dark. so we need a little bit more to go on than just get in the water and turn the vehicles loose. >> and we're showing animation of what these vehicles from wood hull can do. invented by woods hull ocean graphic institution. it's a good reminder the technology is extraordinary. it's the humans behind the technology to interpret the data to keep these thi...

We can't see right now. all this week, cnn's martin savidge has been trying to give us perspective, reporting from inside a 777 flight simulator. he joins us again tonight with flight instructor mitchell casada. i understand this plane can fly 16 to 18 hours on a full tank, but it was heading to beijing and only had about seven hours of fuel. so could it have reached the area where this debris was found? >> reporter: that's the same question had. that's why early today we programmed everything that we knew of flight 370. seven-hour fuel load and we pointed it south. a number of factors we coul...