
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.

Obama administration officials struggled Wednesday to defend their initial statements that the Boeing 787 Dreamliner is safe, while promising a transparent probe of mishaps involving the aircraft's batteries.

Japanese and U.S. investigators began a probe Monday into the maker of the lithium ion batteries used in Boeing's grounded 787 jets.

Some frequent fliers say they aren't worried about safety aboard Boeing's problem-plagued 787 aircraft, while many less-seasoned travelers are often unaware of what model of plane they're flying on.

It's likely that burning lithium ion batteries on two Boeing 787 Dreamliners were caused by overcharging, aviation safety and battery experts said Friday, pointing to developments in the investigation of the Boeing incidents as well as a battery fire in a business jet more than a year ago.

Lithium batteries that can leak corrosive fluid and start fires have emerged as the chief safety concern involving Boeing's 787 Dreamliner, a problem that apparently is far more serious than government or company officials acknowledged less than a week ago.

The federal government grounded Boeing's newest and most technologically advanced jetliner Wednesday, declaring that the 787 cannot fly again until the risk of battery fires is addressed.

Boeing has hit a rough patch with its once heralded Dreamliner 787 series that continues to attract unwanted attention, but it's nothing that will ground the company in the long run, analysts say.

The government stepped in Friday to assure the public that Boeing's new 787 "Dreamliner" is safe to fly, even as it launched a comprehensive review to find out what caused a fire, a fuel leak and other worrisome incidents this week.