On Jan 14th 2014 a JAL Japan Airlines Boeing 787-800, registration JA822J, was parked at the apron of Tokyo's Narita airport and was being prepared for departure for flight JL-707 to Bangkok (Thailand) scheduled about two hours later, when white smoke was observed from the aircraft's main battery, the battery was found overheated, its safety valve opened and electrolyte fluid leaking from the battery. No further damage is being reported, the aircraft was removed from service. A replacement Boeing 787-800 registration JA829J operated the flight departing with a delay of 7 minutes and arriving on schedule. Boeing tweeted that the aircraft was in maintenance, a single cell vented resulting in a smoke event, the new safe guards worked as planned. The battery suffered a fault in the charger and battery. This new ground incident comes a few days after both NTSB and JTSB announced the investigations into the thermal runaways of the APU and main battery in Takamatsu and Boston have been finished and the final reports are being prepared for release later in 2014.