As Boeing’s 787 enters the second month of its fleet-wide grounding, the U.S. airframer is poring over data collected on a series of flight and ground tests and says it is making “good progress” toward a solution. The fix, at least in the short term, continues to be focused on improving containment of the aircraft’s two existing lithium-ion batteries and adding more temperature monitors to provide earlier warning of abnormal battery performance via the engine indicating and crew alerting ...

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