Tiny "fibers" may have played role in 787 battery failure, NTSB says

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The burnt auxiliary power unit battery, removed from an All Nippon Airways' (ANA) Boeing Co 787 Dreamliner plane which made an emergency landing on January 16, 2013 in Takamatsu, is inspected by the manufacturer at the headquarters of GS Yuasa Corp in Kyoto, western Japan, in this handout photo taken on January 26, 2013 and released by the Japan Transport Safety Board (JTSB) February 5, 2013. REUTERS/Japan Transport Safety Board/Handout