The Federal Aviation Administration ordered an unexpected nationwide ground stop Friday afternoon after a communications problem affected all U.S. Air Route Traffic Control Centers. The agency said technicians were investigating and described its information as preliminary. Transportation Secretary Sean P. Duffy linked the stop to the communications issue, but officials initially gave no estimate for when flights could resume. It was the second nationwide ground stop since the Sept. 11, 2001, attacks; the previous one occurred in January 2023 after an FAA systems outage.
The order prevented new flights from departing, while aircraft already in the air continued toward their destinations. Around 3,115 flights were still inbound to U.S. airports at about 4:40 p.m. Eastern. Pilots and controllers at airports including Dallas-Fort Worth and Seattle-Tacoma learned of the stop over radio, with controllers saying its duration and cause were unknown. Passengers were warned to expect delays, though Reagan National and Dulles airports remained open. United said it would hold new domestic departures and help customers reach their destinations once the problem was resolved.
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