The nationwide ground stop lasted nearly five hours after switches and routers on the FAA's 1980s-era network became overloaded with data following an update. Homeland Security Secretary Markwayne Mullin and Microsoft both confirmed that the aviation breakdown was entirely separate from a global Microsoft outage affecting services like Teams and Outlook. Transportation Secretary Sean Duffy announced he is requesting $50 billion in emergency funding from Congress to replace the aging air traffic framework. Flight-tracking data recorded over 10,000 flight delays and more than 6,600 cancellations nationwide.
Key points
Government officials and developers found no evidence that cyberattacks or artificial int…: Government officials and developers found no evidence that cyberattacks or artificial intelligence tools caused the FAA network to fail.
Aging 1980s copper lines and routers collapsed after newly patched equipment and an updat…: Aging 1980s copper lines and routers collapsed after newly patched equipment and an update overwhelmed the air traffic system.
Transportation Secretary Sean Duffy is seeking $50 billion in emergency funding from Cong…: Transportation Secretary Sean Duffy is seeking $50 billion in emergency funding from Congress to fully rebuild the FAA's infrastructure.
Sources checked by our analysis pipeline: 1
Microsoft has denied any link between its own global outage and the air traffic control failure that grounded every departing flight in the US on Friday. More than 10,000 flights were delayed and over 6,600 cancelled, according to flight tracker FlightAware. “We have no indication that the FAA’s nationwide ground stop is related to any Microsoft services,” the company wrote on X, hours after the Federal Aviation Administration (FAA) froze takeoffs nationwide.
The suspicion was easy to understand. Microsoft 365 had been down since Thursday, knocking out Outlook, Teams, Copilot and even Xbox Live for users in 74 countries. Then, just before 4pm ET on Friday, the FAA’s 22 regional air traffic control centres started losing radar data and radio contact with aircraft. Two massive tech failures in two days was enough for people online to connect them. Homeland Security Secretary Markwayne Mullin did not buy it. He told reporters they were “separate issues” and that he did not see “any reason to connect those two at all.”
An old FAA network, not Microsoft or AI, caused the US flight…
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The Federal Aviation Administration's nationwide ground stop on Friday disrupted travel for over 1.5 million passengers after legacy network hardware became overwhelmed by data. The breakdown hit all Air Route Traffic Control Centers, reigniting severe concerns over decades of federal underinvestment in critical aviation infrastructure. The disruption also lent immediate urgency to a multi-billion-dollar emergency funding request now pending before lawmakers in Congress.
Federal officials have ruled out a cyberattack after an unprecedented data overload struck aging radar and telecom switches following a recent technology integration. The resulting multi-hour freeze halted domestic travel and blocked inbound international flights from Europe, Canada, and Australia, stranding tens of thousands of passengers. Regulators now warn that airlines will face severe operational knock-on effects across the country for days.