WASHINGTON — The United States has lifted a nationwide restriction on departing flights after a communications failure disrupted air traffic control operations across the country. The Federal Aviation Administration (FAA) allowed flights to resume on Friday after several hours of disruption, but warned that delays and cancellations could continue as airlines worked to restore normal operations.
The problem affected communication systems linking several regional air route traffic control centres. The FAA ordered airports across the country to suspend departures as a safety measure. Aircraft already in the air were allowed to land safely.
More than 1,000 flights were cancelled, while thousands of others were delayed. Some aircraft were diverted to alternative airports, adding to pressure on major aviation hubs. Airlines also faced difficulties repositioning aircraft and crews after the restrictions were lifted.
US Transportation Secretary Sean Duffy and Homeland Security Secretary Markwayne Mullin said investigators were examining possible technical problems involving ageing air traffic control infrastructure and newer communications systems.
The Department of Homeland Security said there was no evidence of a cyberattack. Officials also said there was no confirmed link between the incident and the recently introduced AI-powered air traffic control technology.
The disruption has renewed concerns about the need to modernise America's ageing air traffic control infrastructure. Authorities warned that it could take time for airlines to restore normal flight schedules.
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