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Supposition or is this looking pretty plausible? >> it looks plausible to me at this point. you know, to think of where the pings are coming from, we touched on this before, it's acars, the aircraft communication and reporting system. thank you very much. >> and if you could, for the rest of us who don't live your world, that's the first i've really heard much about acars. i don't really understand much about it. >> acars was set up so the information from the aircraft, maintenance information about engines, to position aircraft, anything about position of the aircraft, anything going wrong, t...

Be getting that information. so, in other words, boeing offers a service that would gather the information and help provide maintenance information. >> the fact is everything contradicts everything else. leah, thank you very much. let's get to peter gold, former managing direct at the at the ntsb, knows what he is talking about. this is the most confusing one i've seen. how about you? >> awfully challenging and awfully chaotic in the early days. >> two matters of great interest to me at this moment. we got word from the military they're moving assets west and word from the white house a new se...

System that is automatically sending maintenance information to the ground and the airlines communications, and the transponder is your means of communicating with air traffic controllers electronically to let them though what your aircraft is doing, which direction it's flying, how fast it's going and all that sort of thing. if the it went off first, i understand it was like 14 minutes before the transponders went offline? >> right. >> it's a puzzle to me, because that means that during those 14 minutes, they were getting good data for the air traffic controllers on the ground about what the ...

Mh-370 took off at 12:41 a.m. local time. at 1:07 a.m., the aircraft communications addressing and reporting system, or acars, which send maintenance information to the ground, sent its last transmission. it was, apparently, disabled sometime within the next half hour after that transmission. a maneuver that may have required someone to climb through a trap door right by the plane's left hand front exit in full view of the cabin crew to switch the circuit breakers. at 1:19 a.m., the plane signed off from malaysian air traffic control. >> the last voice message from the aircraft was from the co...

About the periodic pushes of data. they said it went beyond the standard maintenance information. the transponder went dark as a second data system on that flight. but what is not unby investigators is whether this was a deliberate act or the result of a cascading electrical failure. the malaysian authorities are the only people in charge of this at this point. what are they saying about this new information? >> reporter: the malaysian authorities are not commenting on the signals data except to say it's been shared with up s. investigators. this is a case where u.s. investigators are taking a...