WASHINGTON -- The National Transportation Safety Board continues to investigate the problems surrounding battery failures on board Boeing 787 Dreamliners.
In a recent string of incidents, two Boeing 787's experienced battery failures which resulted in the grounding of the entire fleet by the FAA.
A fire broke out in the belly of a 787 on the ground in Boston while another 787 had to make and emergency landing in Japan.
Today, the NTSB held a news conference to announce their findings so far in the investigation.
"We know that the lithium ion battery experienced a thermal runaway, we know that there were short circuits and we know that there was a fire," said Deborah Hersman, NTSB chairwoman. "It is really hard to tell at this point how long the investigation will take, what I can tell you is that we have all hands on deck, we are working as hard as we can to identify what the failure mode is here and what corrective actions need to be taken."
It is not known when the fleet will be back in the air.