The combined map showing most informations, projections and evidence gathered so far...

MAP: The Possible MH370 Debris Sighting Fits The Former Pilot's Theory Of A Fire Or Smoke In The Cockpit | Business Insider

And the edited plot to put emphasis on the last six pings, from 03:11 all the way to the last ping at 08:11 on its Southern arc section...

http://i38.photobucket.com/albums/e1...amapa/ping.jpg

The plane as the ping plot showed was on a straight line roughly heading south until it presumably ran out of fuel and crash somewhere within or in the vicinity of the search area in the South Indian Ocean/ the South Sea.