The Federal Aviation Administration (FAA) lifted a nationwide ground stop on Friday evening after a telecommunications outage disrupted flight operations across the United States. The ground stop, which began at 3:44 PM ET, was implemented “due to extraordinary circumstances and for reasons of safety,” allowing only landing aircraft to continue their approach. By 8:15 PM ET, the FAA announced that flights could resume, although significant delays and cancellations were expected as airports faced congestion and crew limitations.
During a press conference, Transportation Secretary Ryan Duffy attributed the outage to an aging air traffic control system, which experienced data inconsistencies due to overloaded analog telecom devices. Reports suggest that an update to the private communications network operated by L3Harris may have triggered the system reboot that caused the outage. As of the latest updates, over 9,000 flights were delayed and nearly 6,000 canceled, according to FlightAware.
Homeland Security Secretary Markwayne Mullin stated there was no evidence to suggest a cyberattack or national security threat related to the outage. He also noted that the cause of the telecommunications failure had not been definitively identified. Speculation arose regarding a potential link to the recently activated AI Strategic Management of Airspace, Routes and Trajectories (SMART) system, but Air Space Intelligence, the company behind SMART, denied any connection, asserting that the ground stop was unrelated to their system.
Reports indicate that the outage originated from the Chicago air traffic control center and quickly spread to other major centers, including Boston, Washington, New York, and Minneapolis. This cascading failure disrupted both radar and radio frequencies essential for communication between air traffic controllers and pilots, leading to the FAA’s decision to halt all flights.
As the FAA works to restore normal operations, the incident highlights ongoing concerns regarding the reliability of the air traffic control infrastructure and the need for modernization. The agency is pursuing funding to replace outdated systems, which have been increasingly prone to failures.
