US officials say flight stoppage stemmed from routine maintenance

US officials say flight stoppage stemmed from routine maintenance during a four-hour Federal Aviation Administration (FAA) event that paralyzed air travel across the country. The grounding, which marked the longest nationwide stop in 25 years, resulted in thousands of delays and cancellations, leaving passengers stranded in major cities including New York, Boston, Washington DC, and Miami.

During a Saturday briefing, US Transportation Secretary Sean Duffy explained that the issues originated at a remote FAA facility where a contractor was replacing copper wiring with fiber optic cables. Duffy noted that the department is investigating whether the incident was caused by human error or a faulty router. He confirmed that once the specific work site was isolated, systems were restored, allowing the ground stop to be lifted.

The FAA ground stop was caused by maintenance work on an aging telecommunications system.

Investigating the cause

FAA head Bryan Bedford apologized to travelers and expressed optimism that the worst of the disruption has passed. While he acknowledged that cancellations would persist through the weekend, he stated that airline partners expect to return to full schedule integrity by Sunday evening. Both Duffy and Bedford explicitly ruled out cyber-attacks or hostile foreign interference, emphasizing that there was no evidence of nefarious activity or AI-related failures.

The incident has highlighted concerns regarding the nation's infrastructure. Duffy pointed to the reliance on a decades-old air traffic control system and outdated telecommunications equipment as a primary vulnerability. The Trump administration has urged Congress to provide full funding to replace the aging air traffic control network to prevent future outages.

Travel chaos continues

Even as officials provided updates, the ripple effects of the grounding continued to impact travelers. FlightAware reported that by Saturday morning, over 4,000 flights had been canceled, adding to the 8,000 cancellations from Friday. Major carriers, including American Airlines and Delta, warned that passengers should expect ongoing delays as airlines work to reposition crews and aircraft. The disruption also forced the rescheduling of several high-profile sports events, including college football and basketball games.

Why it matters

The grounding represents only the third nationwide FAA stop this century, following the 2001 terrorist attacks and a 2023 pilot notification system failure. The persistent delays affect thousands of domestic and international travelers, including those connecting through US hubs, as airlines struggle to restore normal operations.