FAA ground stop was issued over problems replacing old wire, US transportation secretary says

The FAA ordered a nationwide ground stop for departures across U.S. airports after reports of communications problems affecting air traffic control facilities nationwide, the U.S. Transportation Secretary said. The stop was issued to address safety concerns tied to the ongoing issue with the air traffic control system, and it marks a broad disruption to outbound flight operations while already airborne aircraft were allowed to continue toward their destinations under the last assigned clearances, according to multiple outlets reporting on the directive.

Emergency and aviation authorities implemented the ground stop through the FAA’s notice to air missions and Air Traffic Control System Command Center coordination, with officials noting that inbound international flights would be managed on a case-by-case basis. The advisory described the action as extraordinary and described the necessity to suspend departures until the safety issue could be evaluated and resolved, a characterization echoed by several outlets covering the incident.

In a Chicago-area development, a ground stop was also imposed at O’Hare International Airport, with departures held from 1:00 p.m. to 2:15 p.m. local time due to thunderstorms, as reported by PIX11. FAA guidance indicated the window was specific to that time frame, and weather considerations were cited as a factor in the disruption. Coverage from FOX 32 Chicago and ABC7 Chicago framed the local conditions as part of the broader national grounding, noting generally adverse weather and ongoing flight-cancellation activity around the hub.

Nationally, outlets described a temporary, broad halt on departures with no officially announced end date at the outset. NBC News and ABC News characterized the action as an unprecedented nationwide grounding, likening it to an ATC Zero posture, while others noted there was no immediate information on duration or the airports affected beyond the nationwide scope. Airport and airline status inquiries were urged by reporting to reflect the uncertainty in schedules as the situation evolved.

According to AVweb and other aviation outlets, Transportation Secretary Sean Duffy referenced a communications problem affecting all 22 Air Route Traffic Control Centers as the underlying issue; FAA technicians were actively investigating the cause. The nationwide advisory indicated that all departing traffic should remain ground stopped until further notice, with inbound international traffic subject to case-by-case management. The prior day’s ground stop in Chicago-area operations was noted as having preceded the nationwide directive.

Reportedly, Canadian airports also reacted to the U.S. airspace advisory, with Toronto Pearson International and Montréal-Trudeau International issuing their own ground stops in response to the U.S. situation. Boston 25 News and Business Insider highlighted that NAV CANADA indicated its systems were operating normally, but airports still halted air traffic flow due to the U.S. advisory, suggesting potential implications for U.S.-bound international flights and diversions if volumes rose.

Industry data cited by Business Insider illustrated the broader impact, noting thousands of flights canceled or delayed and several aircraft diverted to alternate airports as the situation unfolded in the United States. The Canadian and U.S. measures together painted a picture of widespread operational disruption, even though specific flight numbers, aircraft types, or injuries were not reported in the supplied material.

The available reporting consistently emphasized that there were no reported injuries or fatalities tied to the ground stop or the related weather disruptions within the supplied sources. The grounding was described as temporary, with officials indicating safety as the primary concern, and no official restoration timeline was provided in the materials at hand.

Across the coverage, authorities cautioned travelers to contact their airlines for real-time schedule updates, given that departures were halted nationwide and schedules could shift rapidly as the situation developed. The reporting noted that international arrivals would be managed on a case-by-case basis, and that the status of the national airspace system was under active investigation as FAA technicians worked to determine the exact cause of the communications issues.