Boeing says it expects to get its Dreamliner airplanes back in the air soon. The Federal Aviation Administration grounded all U.S.-registered 787 Dreamliner aircraft last week, pending an investigation of a possible battery-fire risk following two incidents in the new planes. No one was injured in either incident, but in both cases battery failures led to the release of flammable electrolytes, heat damage and smoke, according to the FAA. "Before further flight, operators of U.S.-registered, Boeing 787 aircraft must demonstrate to the Federal Aviation Administration that the batteries are safe," the FAA said in a statement. United Airlines currently is the only U.S. airline operating the new Dreamliner, although the FAA advised international authorities to follow suit in temporarily grounding the planes. "The safety of passengers and crew members who fly aboard Boeing airplanes is our highest priority," Boeing responded in a statement. "Boeing is committed to supporting the FAA and finding answers as quickly as possible." According to a report published by Reuters on Tuesday, the chief executive of Norwegian Air Shuttle was told by Boeing to expect his first 787 Dreamliner in April, on time and on schedule.