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Officials: Dreamliner battery not defective

Safety officials say that manufacturing defects did not cause battery problems on Boeing 787s earlier this month.

Japanese officials investigating alleged defects in the battery of a Boeing 787 Dreamliner that made an emergency landing earlier this month say that the manufacturing process did not cause problems inside the battery.

GS Yuasa, the Japanese battery maker, has been at the center of the controversy surrounding alleged problems with the battery of an All Nippon Airways 787 which made an emergency landing in Japan on January 16.

“There were several reports on quality control issues, but there was nothing that would have caused an immediate problem inside the battery,” said Shigeru Takano, director of the air transport safety unit of the Civil Aviation Bureau, on Monday.

US and Japanese authorities are investigating fire and smoke incidents with lithium-ion batteries on two seperate Dreamliners in recent weeks, prompting aviation officials to ground the aircraft indefinitely.

On Sunday, US safety regulators said that “no obvious anomalies were found” in their initial investigation of an undamaged battery aboard a Dreamliner which caught fire while parked at Boston’s Logan international airport.
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