Boeing looks at battery maker

Overheated lithium ion battery grounded all 787 jets

Tuesday, January 22, 2013

— Japanese and U.S. officials opened an investigation Monday into the maker of the lithium ion batteries used in Boeing’s grounded 787 jets.

Tsutomu Nishijima, a spokesman for GS Yuasa, the battery manufacturer, said investigators visited the company’s headquarters in Kyoto, Japan, and that Yuasa was cooperating.

“We’re checking parts and the manufacturing process to ensure work was carried out appropriately,” said another GS Yuasa spokesman, Shigeru Takano.

All 50 of the 787 Dreamliners that Boeing has delivered to airlines were grounded after an overheated battery forced the emergency landing of an All Nippon Airways 787 flight last week in western Japan. Boeing has halted deliveries of new planes until it can address the electrical problems.

Monday’s investigation involved an introductory meeting and factory tour, with deeper studies into product quality and other issues to follow as the probe continues, said Tatsuyuki Shimazu, the chief air worthiness engineer at the Civil Aviation Bureau’s Aviation Safety Department.

Two investigators from the U.S. Federal Aviation Administration and an investigator from Japan’s government were conducting the inquiry into how the batteries are made and assembled and into any quality issues, he said.

“We are in the midst of collecting information, so as to whether there is a problem or not has not yet been determined,” Shimazu said.

Nishijima of GS Yuasa said he could not comment on details of the investigation.

The burned insides of the ANA battery showed it received voltage in excess of its design limits. However, a battery that caught fire in a Japan Airlines Boeing 787 in Boston earlier this month was found not to have been overcharged.

U.S. government investigators said there could still be problems with wiring or other charging components.

In the U.S., investigators from the National Transportation Safety Board planned to meet today with officials from Securaplane Technologies Inc., manufacturer of the charger for the 787’s lithium ion batteries, at the company’s headquarters in Tucson, Ariz ., said Kelly Nantel, a spokesman for the board.

U.S. officials and Boeing are investigating whether the defective batteries were from the same batch, according to two people familiar with the incidents.

If proved true, flaws may be confined to a small number of 787s, rather than indicating a systemic fault with the plane’s design or manufacturing, and could speed resumption of flights on the jet. The people, who weren’t authorized to speak publicly, said the information is preliminary and investigators haven’t yet ruled out other causes.

Information for this article was contributed by Elaine Kurtenbach of The Associated Press and Anna Mukai and Chris Cooper of Bloomberg News.

Business, Pages 3 on 01/22/2013