An official from the JTSB
said a battery identical to the one that encountered problems had been put into the aircraft and was being examined.
Hideyo Kosugi, a JTSB
inspector said that information will be sent to the FAA and Boeing, who will assess it before allowing the jets to operate again in Japan.
investigator Hideyo Kosugi said one theory was that there may have been insufficient protection offered by the batteries' surrounding electrical system.
In a sign that the investigation may be becoming more complex, Japan Transport Safety Board (JTSB
) chairman Norihiro Goto told a news conference investigators may widen their probe to other equipment on the Dreamliner.
Yoshitomo Tamaki, director general at the Japan Transport Safety Board (JTSB
), said checks on the ANA flight that made the emergency landing showed a bulge in the metal box that cases the main battery.
Japan's Transport Safety Board (JTSB
) has confirmed that a fire, which destroyed a China Airlines (CAL) Boeing 737-800 in August 2007, was due to maintenance error.