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The Boston Globe

Business

Boeing had been told of problems with batteries

Airline reported making 10 replacements

NEW YORK — Even before two battery failures led to the grounding of all Boeing 787 jets this month, the lithium-ion batteries used on the aircraft had experienced multiple problems that raised questions about their reliability.

Officials at All Nippon Airways, the jets’ biggest operator, said in an interview Tuesday that it had replaced 10 of the batteries in the months before fire and smoke in two cases caused regulators around the world to ground the jets.

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