The Federal Aviation Administration’s (FAA) air traffic control facility in Philadelphia experienced a failure of its primary communications circuit on Monday morning, 21 September 2026. When switching to the backup fiber optic line, controllers discovered it had been severed during railroad construction between Newark and New Brunswick, New Jersey. This dual failure caused significant radar and communications outages for air traffic controllers across the New York City metropolitan area.
Newark and Philadelphia Airports Face Major Cancellations
Newark Liberty International Airport halted commercial flight landings from approximately 9:40 a.m. until just after 5:20 p.m. local time. More than 600 flights were canceled in and out of Newark, while
Philadelphia International Airport saw over 200 cancellations. LaGuardia and John F. Kennedy International Airports in New York City also experienced significant disruptions, with ground stops implemented at all affected airports.
Repair Efforts and Official Statements
FAA Administrator Bryan Bedford described the fiber optic line severing as a “massive” break expected to take around 13 hours to repair. The FAA prioritized installing a new circuit to replace the failed primary line at the Philadelphia facility and was simultaneously working to fix the backup fiber. Verizon technicians supported restoration efforts. U.S. Transportation Secretary Sean Duffy confirmed that the damaged communication lines were repaired by Monday evening but
stated, “it will take some time to clear all existing delays.” The FAA credited a New Jersey Transit construction crew for unintentionally cutting the backup fiber line.
Passenger Impact and Airline Responses
Flight operations resumed in the evening across the impacted airports, but travelers faced hours of ground stops and cancellations during the day. Airlines permitted customers affected by delays to change flights without additional fees. Passengers such as Cindy Phan and Shannon Franke reported canceled flights that forced hotel stays and unexpected layovers. Ground stops prolonged disruptions during the United Nations General Assembly week in New York City.
Context of the Outage and Ongoing FAA Upgrades
This outage occurred at the same
Philadelphia FAA facility that caused extensive disruptions at Newark Liberty International Airport in spring 2025. The primary circuit failure is part of infrastructure slated for replacement under the national air traffic control system overhaul. Meanwhile, the FAA began testing a new AI-powered flight scheduling system in the Washington, D.C. area on the same day; this test system was unrelated to Tuesday’s outages.
