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.