Japan Airlines has been forced to cancel a takeoff from Logan Airport in Boston after fuel was found to have leaked from a Dreamliner aircraft.
The incident on Tuesday follows a fire onboard another Dreamliner on Monday.
On Tuesday the plane, bound for Tokyo, had left the gate when about 151 litres of spilled fuel were found.
Passengers were able to disembark safely and no-one was hurt.
The incident on Monday saw an electrical fire break out at the same airport on board another Dreamliner operated by Japan Airlines.
While the first accident is under investigation by the US National Transportation Safety Board, the body said it would not investigate the latest incident as there had not been an accident.