Japan’s investigation into a burning lithium-ion battery aboard a Boeing 787 Dreamliner flight found it was improperly wired, according to an Associated Press report.
The country’s Transport Safety Board had been looking into the circumstances that led the All Nippon Airways flight to make an emergency landing in southwestern Japan.
All 137 passengers and crew were evacuated from the aircraft and slid down the Dreamliner's emergency slides. Video of the event captured by a passenger has been viewed worldwide.
According to the AP, the Transport Safety Board’s report said “the battery of the aircraft's auxiliary power unit was incorrectly connected to the main battery that overheated, although a protective valve would have prevented power from the APU from doing damage.”