December 13 - Qatar Airways grounds one of its three 787s after finding the same electrical problem that affected the December 4 United flight.
December 17 - United confirms finding an electrical problem in a second plane in its 787 fleet.
January 7 - A parked 787 operated by Japan Airlines (9201.T) catches fire at Boston Logan International Airport after a battery in an auxiliary power system explodes.
January 8 - A second 787 operated by Japan Airlines leaks fuel at Logan, forcing it to cancel its takeoff and return to the gate. The plane departs later.
Following a safety inspection, United finds a wiring problem in the same electrical system that caused the January 7 fire in Boston, the Wall Street Journal reports.