Boeing has been ordered to ensure passengers on its new 787 Dreamliner jet cannot hack into the flight system and take control of the plane. The ruling has come from America's Federal Aviation Administration (FAA), which is concerned that the plane's computer system may be vulnerable. Boeing said it was in constant dialogue with the FAA to resolve the issue. The US giant will start to deliver the mid-sized planes from November. British Airways has ordered 24 Dreamliners. Rival UK carrier Virgin Atlantic has orders for 15.