United States and Japanese investigators are now focusing their investigation of the problems with the batteries with its Japanese manufacturer. According to this report by Reuters, GS Yuasa Corp, which makes batteries for the 787, said the company was fully cooperating with the investigation, and its engineers were working with the officials from the U.S. Federal Aviation Administration (FAA) and Japan’s Civil Aviation Bureau (CAB) at the company’s headquarters in Kyoto, where it makes airplane batteries.

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