Malaysia plane: 10 questions that are still unresolved...

As the search for missing Malaysia Airlines flight MH370 continues in the southern Indian Ocean, some key questions remain unanswered.

Here are 10 questions about what happened to the Boeing 777 that disappeared after leaving Kuala Lumpur bound for Beijing on 8 March, with 239 people on board.

1. Why did the plane make a sharp left turn?

Military radar logs show flight MH370 turned unexpectedly west when it diverted from its planned flight path, by which time the plane's transponder had already been switched off, and its last ACARS datalink transmission sent.

Sudden turns like this are "extremely rare", according to Dr Guy Gratton of Brunel University's Flight Safety Lab. He says the only real reason pilots are likely to make such a manoeuvre is if there's a serious problem on the plane which makes them decide to divert to a different destination, to get the aircraft on the ground.

That could be a fire or sudden decompression, according to David Barry, an expert on flight data monitoring at Cranfield University. Full story...

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