TODAY | January 09, 2013
>>> claim that u.s. officials doubt.
>>> nbc's ron mott is at logan national airport in boston . good morning.
>> reporter: good morning to you. double trouble for japan airlines and boeing over the past 48 hours here at logan as both companies investigate exactly what went wrong. two days in a row at boston 's lo logan airport , a japan airline's jet has landed in the news. on tuesday, a new 787 full of passengers and already headed toward the runway had to turn back to the gate after pilots learned jet fuel , about 40 gallons, was spilling from the left tank on to the tarmac. monday, a different 787 parked at the gate following a flight emptied of passengers and crew began smoking. a fire down below that ntsb and boeing investigators have traced to the auxiliary power battery unit.
>> a condition in the avionics department that included the batteries and some of the electronic equipment .
>> reporter: according to reports, one firefighter was injured battling monday's fire. boeing said of the fire, quote, nothing that we've seen in this case indicates a relationship to any previous 787 power system events, which involved power panel faults elsewhere in the afl electrical equipment bay. clearly, this is not the pr they dreamed about.
>> i'll fly on a 787 any time. i have absolute confidence in the airplane. there are going to be teething problems with a new airplane. it's quite common.
>> reporter: in light of all of this, united airlines says it will examine its fleet of 787s, looking for any signs of trouble. natalie?
>> ron mott in boston . thanks so much, ron .