(Reuters) - Boeing Co
Regulators grounded the 787 on January 16 after a battery fire in Boston and a second incident involving a battery on a flight in Japan.
The newspaper, citing government and industry officials, said Boeing was looking at changes within the battery to keep heat or fire from spreading. Technical details have not yet been finalized or approved, though, the paper's sources noted.
One source added that under a best-case scenario, passenger flights could resume next month.
Some 50 Dreamliners have been grounded while investigators try to solve the battery mystery, costing airlines tens of millions of dollars already.
(Reporting By Ben Berkowitz; Editing by Gary Hill, Bernard Orr)
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