From the nytimes:Completely erroneous and disproven by known facts.
The plane took off at 12:41 a.m. on March 8 carrying 239 people headed for Beijing and reached a cruising altitude of 35,000 feet at 1:01 a.m. Six minutes later, at 1:07 a.m., the Malaysian authorities say, the plane sent its last Acars message, which reported nothing amiss.
http://www.cnn.com/2014/03/18/world/asia/malaysia-airlines-plane/The authorities have not specified what time the last verbal exchange between the cockpit and the air traffic controllers took place. But Mr. Hishammuddins statement means it would have occurred between 1:08 a.m. and 1:21 a.m., when the planes transponder stopped transmitting and ground control lost contact with the jet.
1:07 am : Acars (Aircraft Communications Addressing and Reporting System) last message. If there is no emergency it will send the next message 30min later at 1:37.The Thai military was receiving normal flight path and communication data from the Boeing 777-200 on its planned March 8 route from Kuala Lumpur to Beijing until 1:22 a.m., when it disappeared from its radar.
Six minutes later, the Thai military detected an unknown signal, a Royal Thai Air Force spokesman told CNN. This unknown aircraft, possibly Flight 370, was heading the opposite direction.
This is a packet digital system on HF/VHF or Satcom that shares the frequency with others so it's not transmitting at all times.
1:19 am : Last verbal message sent.
1:22 am : Transponders off
1:28 am : plane turns around
1:37 am : No message from Acars.
It's very possible that the same event (accident or human intervention) that took out the transponders at 1:22 also disabled the voice systems and Acars at the same time. If the pilots were busy with a fire in the cockpit or other emergency that required them to move from the flight consoles, quickly punching in a location (that might have been a preprogrammed 'bugout' location) and letting the plane fly on auto to a possible landing location is not a outlandish possibility.
http://www.washingtonpost.com/blogs...plane-be-skeptical-what-you-hear-about-mh370/
http://www.airtrafficmanagement.net/2014/03/mh370-satcoms-101/
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