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Automatic oxygen system that is programmed along with the flight plan itself. this aircraft, if it went up to 43,000, the pressure altitude is 8,000 feet. if it went to 450, it would be 10,000 feet. but there are two buttons for the oxygen system. all the pilot or the co pilot would have to do is go to the manual mode on the oxygen system there. >> and they can override it. how much oxygen would the passengers have had in the oxygen masks? >> they would have had 22 minutes. all you have to do is run the pressurization controller up to 18,000 feet, the masks would drop, after 22 minutes, the pi...

Before it leveled off and continued westward? >> well, if the two of them were wrestling, yes, possibly. but that, even though the man didn't have a great deal of nighttime, by the time you're in the right seat, you've gone through the process, you can make a turn without making all kinds of crazy gyrations, even though you're a junior pilot. >> your belief about -- clearly somebody -- well, not clearly, someone appears to have seized control of this airplane, and the thought is what does that person do with the passengers on board, the 227 passengers on board, once that's done? the theory was...

The 777, the oxygen system is an automatic oxygen system that is programmed along with the flight plan itself. this aircraft, if it went up to 43,000, the pressure altitude is 8,000 feet. if it went to 450, it would be 10,000 feet. but there are two buttons for the oxygen system. all the pilot or the co pilot would have to do is go to the manual mode on the oxygen system there. >> and they can override it. how much oxygen would the passengers have had in the oxygen masks? >> they would have had 22 minutes. all you have to do is run the pressurization controller up to 18,000 feet, the masks wou...

Clearly there could be some type of incapacitation of pilots, they reprogrammed to get back and kept ongoing. >> so one theory the pilots actually turned off the transponders. >> no, let's say there's some type of massive event happened on the airplane and they want to get back to kuala lumpur, they reprogram and change and the pilot becomes completely incapacitated and kept ongoing. >> we've seen a case before where because they didn't turn on the oxygen system the whole crew was incapacitated, the airplane flew to its destination, circled to the airport, ran out of fuel and crashed. >> that'...

This aircraft. >> there is a thing called acars. the airline's service data system. >> that's correct. >> did i get that right? >> yeah. it's a maintenance system that goes to a satellite and then to the ground that provides information about the mechanical health of the aircraft. it was that system that was very helpful in identifying the location of the air france accident. so i understand that information has come to light that may indicate that there's a possibility and this is pure speculation at this point, that this may be similar to the payne stewart flight, that there was some decompr...