The aircraft, scheduled to take off from Logan International Airport at noon with 178 passengers aboard, returned to the terminal after the fuel leak was noticed, airport spokesman Matthew Brelis said.
Officials are determining whether 40 gallons of fuel spilled from the Dreamliner's left engine wing area, as airport fire crews and the Clean Harbors environmental company worked to clean up the fuel spill, the Boston Globe reported Tuesday.
There have been no injuries, Brelis said.
Monday a fire was discovered in the battery compartment of a different Japan Airlines Boeing 787 that had arrived at the airport from Tokyo. The problem was traced to an improperly installed bundle of wires connected to an auxiliary power battery, The Wall Street Journal reported Tuesday
The Federal Aviation Administration said in a statement it was investigating both incidents.