The disruption began when defense contractor L3Harris attempted to upgrade an air traffic control router from copper to fiber wiring at a remote site. This maintenance triggered approximately 1,000 automated connection attempts every four to five seconds, quickly overwhelming the agency's vital communications network. Flight systems were restored after technicians isolated the site, but airlines faced thousands of residual cancellations on Saturday while repositioning displaced crews and aircraft. Officials expect operations to return to normal schedule integrity by Sunday evening.
Key points
Federal officials confirmed that the incident was strictly an infrastructure breakdown ra…: Federal officials confirmed that the incident was strictly an infrastructure breakdown rather than a malicious cyberattack.
Airlines anticipated up to 5,000 flight cancellations on Saturday while working to reposi…: Airlines anticipated up to 5,000 flight cancellations on Saturday while working to reposition displaced aircraft and personnel.
Transportation officials expect a full operational recovery and complete flight schedule…: Transportation officials expect a full operational recovery and complete flight schedule integrity by the end of Sunday.
Sources checked by our analysis pipeline: 1
Sean Duffy, the country’s transportation secretary, said his agency is ‘going to hold people accountable’.
The top United States transportation official has said work being performed on an antiquated telecommunications system could be to blame for a rare, hours-long US Federal Aviation Administration (FAA) ground stop that halted all air traffic inside the country.
At a news conference in Washington, DC, on Saturday, US Transportation Secretary Sean Duffy spoke about routine maintenance that was performed on Friday to upgrade a router from copper to fibre at a “very remote location”.
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Duffy said “contractor error or a faulty piece of equipment” caused the router in question to start flooding other ones in the country’s air traffic control system.
“We had 1,000 connection attempts ever four to five seconds,” he…
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