Inspections of the production facilities of GS Yuasa (PINK:GYUAF), the Japanese firm that makes the lithium-ion batteries in Boeing‘s (NYSE:BA) troubled 787 Dreamliners, failed to identify any problems that could have caused the string of serious incidents that have plagued the new jet, CNN noted.
Kanto Aircraft Instrument, which produces the airplane’s battery monitoring system, will now face scruitiny from U.S. and Japanese regulators. Boeing had received permission from the U.S. Federal Aviation Administration to replace standard batteries with litium-ion models in 787 Dreamliners.
Boeing’s worldwide fleet of Dreamliners was grounded earlier this month after a series of incidents, including the emergency landing of a Dreamliner in Japan and a fire in an auxilliary power system of a 787 at Boston’s Logan Aircraft.
U.S. regulators say the fire on the 787 in Boston involved the overheating of its lithium-ion battery, though they cannot say if that was the cause of the fire. Safety systems designed to prevent the overheating failed to stop it.
Shares of Boeing slipped fractionally in Tuesday morning trading.