Why did the transponder stop transmitting?
My bet is still on the aircraft's possible sudden, rapid depressurization theory. If the pilots failed to put on masks they could have blacked out from the lack of oxygen. So, this theory goes like this: the sudden decompression of the plane for unknown reasons, but it could have been from a crack in the fuselage; turning the plane to return to land with auto-pilot on; failure to don face masks; the flight continues for four hours; the plane runs out of fuel; and falls into the Indian Ocean. In this scenario, all the passengers and the pilots would be long dead before the actual crash, since no cell phone calls came from any of the passengers. This would also account for calls being made to some of the passengers by their relatives - the phones were still connected but no answer was heard. Go figure. ‘There Is Nothing’: Malaysian Authorities Do Not Find Missing Plane Where Chinese Satellite Images Showed Possible Debris CBS News DC: http://washington.cbslocal.com/there-is-nothing-malaysian/plane/possible-debris/ http://washington.cbslocal.com/2014/03/13/there-is-nothing-malaysian-authorities-do-not-find-missing-plane-where-chinese-satellite-images-showed-possible-debris/