A critical halt in U.S. flight departures, the longest since the aftermath of 9/11, continues to baffle aviation authorities as the Federal Aviation Administration (FAA) grapples with an unidentified 'root cause' for widespread infrastructure malfunctions. U.S. transportation officials convened a press conference on Saturday, November 14, 2026, yet a definitive explanation for the technical disruption that grounded flights across the country on November 13 remained elusive.
FAA Administrator Bryan Bedford disclosed that the agency's inability to pinpoint the exact reason for the system's instability compelled them to issue the unprecedented grounding order. "Because of our lack of identifying the root cause, we were unwilling to take any risk that this propagation could actually result in a sensor losing connectivity with aircraft," Bedford explained to reporters, adding, "What we saw was instability. We couldn't explain the instability."
Officials cited issues with critical routers and networking equipment, specifically mentioning products and services provided by technology giants Cisco and L3Harris Technologies. Transportation Secretary Sean Duffy highlighted the current dependence on the latter, stating, "Until I can build [the new architecture], I'm stuck with L3Harris, who owns this network."
(L/R) US Transportation Secretary Sean Duffy looks on as FAA Administrator Bryan Bedford speaks during a press briefing at the Department of Transportation headquarters building in Washington, DC, on November 14, 2026.
Aaron Schwartz | Afp | Getty Images
In response to the crisis, L3Harris Technologies issued a statement on X (formerly Twitter), asserting its commitment to supporting the FAA's investigation. The company also noted its ongoing partnership with other tech firms, having completed over 70% of a planned conversion of airspace communications from legacy copper wiring to a modern fiber-optic system. "L3Harris takes the nationwide ground stop and its impact on travelers, airlines and air traffic operations seriously," the statement affirmed.
The incident has reignited calls for a sweeping overhaul of air travel infrastructure. On Friday, November 13, Secretary Duffy alongside Department of Homeland Security Secretary Markwayne Mullin advocated for significant investments, with Duffy specifically requesting $50 billion from Congress to modernize the nation's aviation systems.
However, FAA Administrator Bedford clarified that the observed router updates were routine operational matters, distinct from larger modernization initiatives. "We are constantly replacing 2,000, you know, Cisco 600 routers with Juniper routers, right? So this is ordinary course of business stuff. This is not part of the … FAA $12.5 billion modernization efforts. So let's not conflate those two things," Bedford cautioned.
