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In reply to the discussion: Final words from jet came after systems shutdown [View all]forkol
(119 posts)There have been a few news reports regarding your questions.
After takeoff, the plane was pretty much over water (and no where near enough to China) on it's normal flight path for some time, so there was no initial concern.
However, when it (reportedly) turned, the plane turned and followed routing that was generally followed for commercial airlines, and so there was still no concerns.
As I have been reading, it's not true that there's total, constant radar coverage for all flights even in this area, contrary to what most people believe. So, basically the flight was ignored because it was flying a general flight path that was reserved for commercial airlines, and any country that was monitoring didn't see anything out of the ordinary.
As for your other point about the passengers using their cellphones, as you rightly mention, they would have to have flown over a populated area since there are generally no cell towers placed in the ocean. Also, I read from news reports, that cell phones do not work above a certain altitude.
But, the more ominous reason is that from other reports, the plane ascended to 45,000 feet, them came down to about 20,000 feet, and re-ascended to about 40,000 feet again before dropping back down to about 30,000 feet. The thinking is that the they went up so high was to de-pressurize the cabin which, in time, would eventually kill the passengers.
But, you say, what about the oxygen masks? I read that there's only a limited amount of oxygen (maybe about 5 minutes worth). The masks are only supposed to be for temporary use, and just allow enough time for a pilot to get a plane low enough so that they were not needed. However, the pilot's oxygen masks last a lot longer. So, if the reports are true, it looks like the plane was taken up to a high altitude twice and long enough to ensure that no passengers would be alive.
Because of all of the flight knowledge needed, it does pretty much seem that you either would need to be a pilot, or know a hell of a lot about commercial airlines, flights, and procedures.