Summary Boeing has since developed and tested a revamped version of the battery system.
TOKYO (AP) - Japan s All Nippon Airways has successfully conducted its first test flight of the Boeing 787 aircraft since battery problems grounded the planes earlier this year.
Ray Conner, president of Boeing s consumer airline division, and ANA President Shinichiro Ito were aboard the flight Sunday.
The aircraft safely completed a two-hour flight before returning to Tokyo s Haneda Airport.
Batteries aboard two 787s failed less than two weeks apart in January, causing a fire aboard one plane and smoke in another. The root cause of those problems is still unknown.
Boeing has since developed and tested a revamped version of the battery system, with changes designed to prevent and contain a fire.
Japan s transport ministry approved Boeing s modifications Friday following similar steps by the U.S. Federal Aviation Administration.
