Boeing Said to Rework 787 Electric System After Fire

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Boeing Co. will have to rework part of the software on the 787 Dreamliner’s electrical system and its power panels after an onboard fire two weeks ago halted flight tests, three people familiar with the matter said.

A stray aluminum washer inside a power panel shorted out during a Nov. 9 flight, causing the blaze, said the people, who asked not to be identified because the details haven’t been released. The 787 test fleet will stay grounded in the meantime, one of the people said.