The city of Phoenix and residents of historic neighborhoods on Tuesday cheered a court ruling to force the Federal Aviation Administration to abandon its decision three years ago to set new flight paths for one of the busiest airports in the United States. A three-judge panel of the U.S. Court of Appeals for the District of Columbia Circuit earlier in the day agreed that the FAA’s decision in 2014 to change the routes in and out of Sky Harbor International Airport in Phoenix was “arbitrary and capricious.” The FAA has made similar changes in flight paths at other airports around the country in recent years under the NextGen program designed to modernize the nation’s air traffic-control system.