Boeing Dreamliner fire cause 'unknown', says US


The US national transportation board has released an interim report into a battery fire aboard a Japan Airlines Dreamliner on 7 January.

It says it still has not discovered the cause of the fire.

Boeing's entire fleet of Dreamliners was grounded after a battery on a Japan Airlines 787 caught fire, and a malfunction forced an ANA flight to make an emergency landing.

Samira Hussein reports.

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