Friday, January 25, 2013

Burnt circuit boards snag Japan Boeing 787 probe

A device seen as key to explaining why a Boeing Co 787 Dreamliner jet made an emergency landing in Japan last week is burnt and unlikely to provide safety inspectors with data they need, said a person with knowledge of the ongoing investigation.
Circuit boards that control and monitor the performance of the plane's lithium-ion battery unit were charred and may be of little use to the teams investigating why the battery effectively melted, forcing safety investigators to scramble for possible clues from other components in the plane's electronics, said the person, who didn't want to be named as the probe is ongoing.Aviation authorities in Japan face a painstaking reconstruction that may take months before they can unravel what caused one of the batteries to overheat, triggering warnings in the plane's cockpit.