The Wall Street Journal reports that the Federal Aviation Administration is set to approve Boeing's fix for the ion-lithium batteries. The 787 Dreamliner has been grounded since mid-January because of smoldering batteries that in one case caused a serious fire.
The Journal says the FAA is expected to announce Friday that Boeing's redesigned batteries are safe. The fix includes more heat insulation and a battery box designed to vent any hot gases from the batteries outside the planes.
There was no immediate comment from the FAA and a Boeing spokesman declined to comment on the report.
The New York Times, which also reported the development, says the aircraft could be back in service next month.