Japan to investigate Boeing 787 battery maker

By REUTERS
January 21, 2013 05:42
1 minute read.

 
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TOKYO - Japan's transport ministry is to investigate the company that makes batteries for Boeing Co's grounded 787 Dreamliner passenger jet. The probe will be run jointly with the US Federal Aviation Administration (FAA), a ministry official said on Monday.

Authorities around the world last week grounded the new lightweight aircraft, and Boeing halted deliveries after a problem with a lithium-ion battery prompted an All Nippon Airways 787 to make an emergency landing at Takamatsu airport during a domestic flight. Earlier this month, a similar battery caught fire in a Japan Airlines' 787 parked at Boston Logan International Airport.US safety investigators on Sunday ruled out excess voltage as the cause of the Boston battery fire on January 7, and said they were expanding their probe to look at the battery's charger and the jet's auxiliary power unit.



"Results have shown the battery was abnormal in both the Boston and Takamatsu (incidents). They were the most damaged," Shigeru Takano, a senior safety official at Japan's Civil Aviation Bureau, told reporters. "We will look into if the work that took place, from design to manufacturing, was appropriate." He did not name the battery maker.

A spokesperson for Kyoto-based GS Yuasa Corp, which makes batteries for the Dreamliner, declined to comment. Shares in the firm, valued at close to $1.5 billion, slipped 1 percent on Monday, and have dropped 11 percent since the Boston fire. The benchmark Nikkei was down 0.9 percent.

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