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Dreamliner battery fire caused by 'inadequate design'

New York

THE battery fire that led to the grounding of Boeing Co's 787 Dreamliner jets for more than three months last year was caused by inadequate design and testing, investigators concluded.

Boeing had certified that overheating in one cell of the lithium-ion battery couldn't spread to others and the Federal Aviation Administration (FAA) approved the design and testing. The National Transportation Safety Board (NTSB) faulted both in a final report for not anticipating how the power packs might fail, and cited battery maker GS Yuasa Corp for poor manufacturing.

The findings bring to a close the probe into events that triggered the longest grounding of a large commercial aircraft by US regulators...

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