NEW : FAA grounded all U.S. aircraft over battery safety concern . Boeing : ` ` We will be taking every necessary action '' The batteries are critical to the plane because the 787 is thirsty for electrical power . After Japan grounded the aircraft , experts worry most about Dreamliner 's lithium ion batteries .
NEW : FAA grounded all U.S. aircraft over battery safety concern . Boeing : ` ` We will be taking every necessary action '' After Japan grounded the aircraft , experts worry most about Dreamliner 's lithium ion batteries .