A fuel leak forced a Japan Airlines Boeing 787 Dreamliner to cancel its takeoff on Tuesday at Boston's Logan International Airport.
It was the second incident in two days involving the new airliner.
A separate Japan Airlines 787 had an electrical fire at the same airport on Monday.
The aircraft in Tuesday's incident had left the gate and was preparing for takeoff on its flight for Tokyo when it was discovered that about 40 gallons of fuel had spilled.
The Dreamliner was towed back to the gate where passengers disembarked.
The Federal Aviation Administration has ordered inspections of all 787s.
