Dreamliner Defect Cause Elusive as Burned Evidence Adds Obstacle
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Clues to how the battery packs on two Boeing Co. 787 planes failed are proving difficult to unearth, leaving uncertain when regulators will clear the model to fly again.
Boeing said yesterday it won’t deliver more 787s until the U.S. Federal Aviation Administration instructs it on how to prove the Dreamliner’s flammable lithium-ion batteries are safe. Halting handovers of Boeing’s most advanced model adds to fallout from the Jan. 16 FAA grounding order, which was followed by regulators worldwide, affecting about 50 planes.