Sources: Malaysian PM via AP on YouTube, The Guardian, BBC News, Associate Press
quote: If the climb were to help overcome an on-board fire, then the passengers and crew may have been overcome by smoke or combustion products. That scenario seems likely...
quote: More specifically, if there was an incident on board, I'd look for the nearest airport to land, not head out into the ocean.
quote: I've seen this argument before and I have to say it's bunk. ACARS does not transmit constantly, only every 30 minutes or so.
quote: Altitude changes, if they can be trusted at all (and bear in mind altitude readings at the edges of the radar's effective range or of questionable reliability) could be the result of the aircraft being improperly trimmed for speed. That would produce a smooth, stable, gradual increase in altitude until the plane stalls out. Then it would pitch forward and fall until the increasing air density along with the plane's trim settings pulled it out of the dive and back into the same gradual climb.
quote: Autopilot could not maneuver the plane at 45000 feet. Nor can it makes the plane climbed to 23000 feet after dropping to about 12000 feet
quote: Phugoid oscillations for larger aircraft with improper trim are typically less than a minute to a few minutes. On United 232, it was about 40-60 seconds. That was a 55 meter DC-10, not much different from a 61 meter 777.It's highly unlikely that the reported altitude variations (~20,000 feet) could've been caused by a phugoid. At most you'd expect to see a variation of a few thousand feet.http://en.wikipedia.org/wiki/Phugoid
quote: The later course changes are harder to understand but it's possible that the plane was flying dead stick with the auto-pilot off. Small instabilities can cause heading changes before the fly by wire safety systems override and level the plane out again (doesn't happen until the plane is rolling 30 degrees or more to one side). Of course, it's also possible that the flight crew was suffering from hypoxia (either from smoke inhalation or decompression) and was simply not making good decisions by that point.