Japan Airlines has temporarily grounded one of its 787 Dreamliners after white smoke was spotted outside the plane, warning lights in the cockpit indicated possible faults with the main battery and charger, and one battery cell appeared to be leaking. 

The incident comes nearly a year to the day after Japan Airlines and All Nippon Airways grounded their 787 fleets after two 787 batteries overheated on two different planes in less than two weeks.  


Boeing said it was "aware of the 787 issue that occurred Tuesday afternoon at Narita, which appears to have involved the venting of a single battery cell". 

Japan Airlines said maintenance engineers who were in the cockpit saw white smoke from the cockpit. When they went outside the aircraft the smoke had dispersed.  


The planes remained grounded for more than three months while Boeing redesigned the battery, charger and containment system to ensure battery fires would not put the airplane at risk.