Boeing's troubled 787 Dreamliner continues to face problems as more global regulators and airlines grounded the plane on safety concerns.The Federal Aviation Administration (FAA) ordered US airlines to stop using 787s temporarily after a battery fault caused an emergency landing in Japan.Airlines in Chile and India quickly complied by grounding their Dreamliners.Boeing said that it stood by the integrity of the 787.A string of issues have raised questions about the 787's future.In recent weeks Dreamliners have suffered incidents including fuel leaks, a cracked cockpit window, brake problems and an electrical fire. However, it is the battery problems that have caused the most concern.On Wednesday, an All Nippon Airways (ANA) flight made an emergency landing because of a battery malfunction. That caused them to ground all 17 of their Dreamliners and Japan Airways followed suit.The FAA said that airlines must demonstrate battery safety before flights can resume.'Every necessary step'The FAA added that it had alerted the international aviation community of its airworthiness directive so that other authorities could take parallel action to cover the fleets operating in their countries.Leithen Francis, from Aviation Week, said that could mean more bad news for Boeing in the coming days."When the FAA issues an airworthiness directive civil aviation and airlines around the world have to follow the FAA airworthiness directive, particularly in regards to the 787 because it a US-designed and developed aircraft," he told the BBC.Boeing said it supported the FAA but added it was confident the 787 was safe.Chief executive Jim McNerney said: "We will be taking every necessary step in the coming days to assure our customers and the travelling public of the 787's safety and to return the airplanes to service."Boeing deeply regrets the impact that recent events have had on the operating schedules of our customers and the inconvenience to them and their passengers."Boeing shares closed down more than 3% on Wall Street on Wednesday.Complying airlinesUnited Airlines, the only US airline currently operating Dreamliners, said it would immediately comply with the FAA's directive and would begin re-accommodating customers on alternative aircraft.Chile's LAN announced it would suspend usage of its three Dreamliners in co-ordination with the Chilean Aeronautical Authority.Indian aviation regulators also complied by ordering Air India to stop operating its 787s."The FAA has issued an advisory to ground the Dreamliners. We took a decision after that," said director general of civil aviation Arun Mishra."As of now there is no clarity on when the Dreamliners will be back in service. Boeing has to satisfy everyone with safety standards."