Boeing Dreamliner grounded by US regulator 17 January 2013 Last updated at 00:15 The US aviation regulator has told US airlines to temporarily ground Boeing's 787 Dreamliner, following a battery fault on one of the aircraft in Japan. The Federal Aviation Administration (FAA) said that airlines must demonstrate that batteries are safe before flights can resume. United Airlines is currently the only US airline operating the 787. Earlier, Japan's two main airlines grounded their 787s after the battery failure prompted an emergency landing. All Nippon Airways (ANA) grounded its fleet of 17 Dreamliners when its flight NH 692 from Yamaguchi Ube was forced to land shortly after take-off. Japan Airlines then took similar action, saying it would ground its fleet of seven 787s from 16 January until further notice. Boeing shares closed down more than 3% on Wall Street on Wednesday. Broader problems In recent weeks, Dreamliners have suffered issues including fuel leaks, a cracked cockpit window, brake problems and an electrical fire. Late Wednesday, the FAA said it would work with the manufacturer and carriers on an action plan to allow the US 787 fleet to resume operations as quickly and safely as possible. "The in-flight Japanese battery incident followed an earlier 787 battery incident that occurred on the ground in Boston on January 7, 2013," the regulator said. The AD (airworthiness directive) is prompted by this second incident involving a lithium ion battery. It said the battery failures resulted in the release of flammable electrolytes, heat damage, and smoke, and the cause of the failures was under investigation. "These conditions, if not corrected, could result in damage to critical systems and structures, and the potential for fire in the electrical compartment," the FAA said. The regulator added that when it issues an airworthiness directive, it also alerts the international aviation community so that other authorities can take parallel action to cover the fleets operating in their countries.