On Monday, September 21, 2026, construction contractors working near a rail corridor in New Brunswick, New Jersey, accidentally severed a Verizon fiber-optic cable at approximately 9:45 a.m. This cable was critical to backup communications for the Federal Aviation Administration’s Philadelphia TRACON, the facility responsible for radar approach and air traffic control across much of the Northeast region.
The damage disabled communications systems at Philadelphia TRACON by causing a primary circuit failure and revealing that the backup fiber-optic line was already compromised. With both communication paths down, the FAA imposed ground stops and operational restrictions on arrivals and departures at five
major airports: Newark Liberty International Airport, Philadelphia International Airport, Teterboro Airport, John F. Kennedy International Airport, and LaGuardia Airport.
The FAA’s emergency measures led to more than 900 flight cancellations or delays across these Northeast airports. Newark was the most affected, with over 600 cancellations recorded by 6 p.m. that day. Philadelphia experienced more than 200 cancellations and over 400 delays. The disruption extended beyond these airports, causing nationwide ripple effects due to aircraft and crew mispositioning, resulting in thousands of delayed or cancelled flights nationwide.
Passengers faced long waits and rebooking difficulties amid widespread cancellations and delays. Some inbound
international flights, including those from Europe, were diverted to airports outside the Northeast. United Airlines waived flight change fees and offered extra pay to staff accepting trips out of Newark. American Airlines also waived change fees and allowed customers to fly from alternate airports to mitigate the impact.
Officials attributed the disruption to the fiber-optic cable cut by construction contractors. Verizon stated its cables were properly installed and that the contractors were responsible for the damage, explaining the contractors should have called for correct utility markings. NJ Transit is investigating the incident alongside Verizon and the contractor to determine full
responsibility. A FAA representative said, “We will continue to work closely with Verizon and the contractor as the circumstances surrounding the incident are being investigated. We will provide additional updates as information becomes available.” Transportation Secretary Sean Duffy confirmed repairs were completed by Monday evening and normal operations had begun to resume but warned, “It will take some time to clear all existing delays.” He emphasized the incident highlighted the critical need for modernization funding, saying, “This incident underscores the need for additional funding to modernise ageing infrastructure and prevent disruptions like this in the future.” FAA Administrator Bryan Bedford
added that the FAA is seeking budget approval to replace the decades-old data architecture, stating, “We’re pulling copper up and putting fiber down, but it’s the same data architecture that we’ve had for 50 years. The FAA wants to replace that architecture with a new modern federal enterprise network system, and we need budget for that.”
The disruption exposed vulnerabilities within the FAA’s air traffic control communication network, which uses aging infrastructure and backup systems that failed simultaneously. Philadelphia TRACON, where the failure occurred, has a history of outages. This incident added urgency to ongoing FAA efforts to modernize and
upgrade the nationwide air traffic control system.
The outage coincided with the opening day of the United Nations General Assembly in New York City, delaying arrivals of numerous international delegations. Canadian Prime Minister Mark Carney’s arrival was postponed, causing him to miss a scheduled summit, according to his office.
After repairs to the damaged fiber cable were finalized on Monday evening, the FAA and affected airports initiated steps to restore normal traffic operations. Nonetheless, substantial delays and cancellations persisted as airlines worked to clear the accumulated backlog through Tuesday, September 22.
Separately on the same day, the FAA, led by
Secretary Duffy and Administrator Bedford, unveiled the Strategic Management of Airspace, Routes and Trajectories (SMART) platform. This AI-supported air traffic management system analyzes multiple data streams to identify congestion and potential disruptions proactively. Officials clarified that SMART is unrelated to the communication failure.
