[UPDATED TO INCLUDE FAA AND BOEING STATEMENTS] US National Transportation Safety Board (NTSB) chairman Deborah Hersman said assumptions made by Boeing and FAA to justify certifying 787 batteries “must be reconsidered.” Briefing reporters in Washington DC on NTSB’s investigation into the Jan. 7 Japan Airlines 787 fire in Boston, Hersman outlined the process by which investigators believe the fire started, but emphasized no root cause has been determined. The certification ...

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