Investigators in the UK have traced the source of an aircraft fire which resulted in the closure of both runways at Heathrow last week.

They say a battery that powers an emergency beacon on the Boeing 787 Dreamliner was responsible.

UK air accident investigators have asked the US company that makes the part to help with their on-going investigation.

They've also requested that the Federal Aviation Administration, which is the authority on air travel in the US, deactivate the emergency beacons on 787 Dreamliners until proper tests are completed.


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