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

The Federal Aviation Administration's emergency order affects only United Airlines, the lone U.S. carrier to operate 787s. United said it would put passengers on other aircraft and work closely with the FAA and Boeing to review its fleet of six Dreamliners.

The FAA action came on the same day that Japan's two biggest airlines – which fly almost half of the world's 50 787s – voluntarily grounded them pending full safety checks.

Boeing said it was working around the clock with investigators.

The 787, known as the Dreamliner, is Boeing's newest jet, and the company is counting heavily on its success. Since its launch after delays of more than three years, the plane has been plagued by a series of problems including a battery fire and fuel leaks. Japan's ANA and Japan Airlines are major customers for the jet and among the first to fly it.

滬江英語(yǔ)快訊：起火、漏油、冒煙……波音787夢(mèng)幻客機(jī)最近事故頻發(fā)，因此美國(guó)聯(lián)邦航空局（FAA）近日已發(fā)布公告要求停飛所有波音787執(zhí)飛的航班，以檢查電池是否安全，這是34年來(lái)美國(guó)采取的首例類似舉措。隨后日本、歐洲和印度也下令停飛該款機(jī)型。

滬江科普：夢(mèng)幻客機(jī)，全稱是波音787夢(mèng)幻客機(jī)，波音787客機(jī)可載客210到330人，飛行里程最遠(yuǎn)達(dá)15000公里。最大特點(diǎn)是機(jī)身大部份由碳纖維材料制造。