FAA Lifts Nationwide Ground Stop for All Aircraft [UPDATE]

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Longtime Slashdot readers cold fjord and sinij share news that the FAA grounded flights nationwide after a communications failure disrupted air traffic control centers across the country. By Friday evening, the outage had resulted in nearly 5,000 flight cancellations and roughly 10,000 delays, with no timeline for restoring normal operations. Rumors are swirling that this could be related to the FAA's newly deployed SMART AI system or Microsoft's recent global outage, but both the agency and Microsoft said they had no indication that their technology was responsible. Business Insider reports: US Transportation Secretary Sean Duffy said just after 4:15 pm. Eastern time that the nationwide flight traffic halt came "following a communication issue impacting all Air Route Traffic Control Centers." "FAA technicians are investigating the issue," he said in a post on X. The outage comes the same week as the FAA deployed SMART, a new AI tool to help air traffic control. ASI, the company that makes the SMART system for the FAA, said that Friday's issues weren't "based on or a result of the SMART system, any product of ASI or our integration with FAA and ATC."

Homeland Security Secretary Markwayne Mullin said in a press conference Friday, when asked if the AI system might be related to the outage: "That's what we're looking at." Microsoft, which faced massive issues across its services this week, also said that it had "no indication" the ground stop was related to any Microsoft services. Meanwhile, the FAA said that the ground stop was due to "extraordinary circumstances and for reasons of safety." UPDATE 1:33 UTC: Secretary Mullin and Secretary Duffy are currently briefing members of the press on the issue.

UPDATE 1:46 UTC: The FAA has lifted the nationwide ground stop after more than four hours. Officials said the disruption appears to have stemmed from a network router issue that cascaded nationwide, with no evidence of a cyberattack or connection to Microsoft's recent outage. Airlines warned that disruptions could continue in Saturday.