The batteries are made by Japan’s GS Yuasa, one of a host of contractors hired by Boeing to build the Dreamliner in a complex web of global outsourcing that led to years of delays before ANA took delivery of the first plane in 2011.
GS Yuasa said it supplies its batteries first to France’s Thales Group, which then assembles a system with other electronics for shipping to Boeing.
“So far, it is not clear whether the cause of the problem was the batteries or the electronic system,” a GS Yuasa spokeswoman said, defending the Japanese company’s “substantial experience and technologies.”
GS Yuasa shares fell more than 5 percent in Tokyo trading yesterday, while JAL and ANA shares were down a lesser amount. Boeing shares finished Wednesday 3.4 percent lower on Wall Street, before the FAA announcement.