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Japan airline replaced 787 Dreamliner batteries 10 times due to problems (+video)

All Nippon Airways says problems with the lithium ion batteries prompted the airline to replace them 10 times. The NTSB wants more info about the 787 batteries from Boeing.

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 U.S. investigators said Wednesday they asked Boeing Co. to provide a full operating history of lithium-ion batteries used in its grounded 787 Dreamliners after Japan's All Nippon Airways revealed it had repeatedly replaced the batteries even before overheating problems surfaced.

National Transportation Safety Board spokesman Peter Knudson said the agency made the request after recently becoming aware of battery problems at ANA that occurred before a Jan. 7 battery fire in a 787 parked at Boston's Logan International Airport. Boeing has already collected some of the information, he said.

ANA said it had replaced batteries on its 787 aircraft some 10 times because they didn't charge properly or connections with electrical systems failed, and informed Boeing about the swaps. Japan Airlines also said it had replaced 787 batteries. It described the number involved as a few but couldn't immediately give further details.

All 50 of the Boeing 787s in use around the world remain grounded after an ANA flight on Jan. 16 made an emergency landing in Japan when its main battery overheated.

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