Late Friday, March 13, 2026, an overheated circuit board at the Potomac Consolidated TRACON produced a strong chemical-like odor that briefly incapacitated some air traffic controllers and prompted an hours-long ground stop affecting multiple East Coast airports, including Baltimore-Washington International Thurgood Marshall (BWI). The FAA reported the stop began in the late afternoon and air traffic was paused at Ronald Reagan Washington National (DCA), Washington Dulles (IAD) and BWI; operations were restored after the source was identified and replaced. Fire and hazmat crews responded in Fauquier County, Virginia, and more than 30 FAA personnel were evaluated for mild symptoms before returning to duty. The interruption produced widespread delays and some cancellations, with lingering ground-delay restrictions into the early hours of Saturday.
Key Takeaways
- The incident began late Friday afternoon, March 13, 2026, at the Potomac Consolidated Terminal RADAR Approach Control (TRACON) in New Baltimore, Virginia.
- The FAA issued a ground stop for DCA, IAD and BWI; the initial stop lasted until about 8:00 p.m., with a ground delay posted to at least 12:59 a.m. Saturday.
- Responding crews were dispatched around 5:46 p.m.; a faulty building monitor and an overheated circuit board were identified as the odor sources and were replaced.
- More than 30 FAA employees were evaluated on site for mild symptoms; none required transport to a medical facility, according to Fauquier County officials.
- The ground stop affected additional airports served by the same TRACON, including Richmond, Philadelphia, Charlottesville-Albemarle and Manassas Regional, producing multi-hour delays and a number of cancellations.
- TSA screening and some airport functions remained operational at BWI during the stop; carriers began resuming service once controllers were cleared to return.
Background
The Potomac Consolidated TRACON manages terminal radar approach control for a dense segment of East Coast airspace, including several major metropolitan airports. TRACONs coordinate arrivals and departures within a roughly 30- to 50-mile radius of airports and are critical to maintaining safe sequencing and spacing of flights. Because multiple busy airports share a single TRACON’s controllers and equipment, an outage or safety issue at that facility can quickly cascade into delays across the region.
Past incidents have shown that even short interruptions at major approach-control centers produce outsized impacts: queued flights must hold or return to gates, inbound traffic is paused, and airlines must rebalance crew and aircraft schedules. The FAA’s established protocols—ground stops, ground delays and reroutes—are designed to prioritize safety while minimizing disruption, but ripple effects are common on busy travel days.
Main Event
The FAA’s online status first listed an equipment outage before clarifying that a strong chemical-like smell at the Potomac TRACON was affecting some controllers. Local emergency services in Fauquier County were called at about 5:46 p.m.; hazmat teams and fire-rescue personnel responded to investigate the odor. Crews located a faulty building monitor being serviced by a contractor and later traced the smell to a circuit board that had overheated.
Federal, local and contractor teams removed and replaced the faulty component; U.S. Transportation Secretary Sean Duffy posted on X that the overheated circuit board was identified as the odor source and has been replaced. While the equipment issue was resolved, controllers and staff on site were evaluated by medical personnel as a precaution. Fauquier County Fire Rescue reported that more than 30 FAA non-fire personnel were examined and none required hospital transport.
Because controllers at the TRACON were affected, the FAA implemented a temporary ground stop for DCA, IAD and BWI, then transitioned to a ground delay program. At BWI, TSA screening lanes remained open and airport staff said carriers would work to resume normal operations; travelers continued to experience delays, with some reports of passengers waiting on jetways for hours before being allowed to deplane.
Analysis & Implications
Operationally, the incident highlights how a single point of failure in air traffic control infrastructure can disrupt a wide geographic area. TRACON facilities are highly interconnected with terminal and en route centers; when one facility must pause operations, downstream traffic management measures ripple across schedules, crew assignments and gate availability. Airlines can reassign aircraft and crews, but that takes time and often results in cascading delays into the next day.
From a safety-management perspective, the response followed standard contingency procedures: pause traffic, assess health risks to personnel, deploy hazmat and technical teams, and restore service only when controllers are cleared and equipment is fixed. The identification and replacement of the overheated circuit board suggest the outage was hardware-related rather than a broader systems failure, which likely limited the duration of the stoppage.
Economically, the immediate costs fall to airlines and passengers in the form of delayed departures, missed connections and potential cancellations. For airports, ground stops strain terminal resources—gate space, customer-service staff and concessions—while TSA and airport operations must maintain throughput for departing and arriving travelers unaffected by the stop.
Comparison & Data
| Facility / Airport | TRACON | Ground Stop Start | Stop End / Delay |
|---|---|---|---|
| Potomac Consolidated TRACON (New Baltimore, VA) | Potomac TRACON | ~Late afternoon, Mar 13, 2026 | Faulty board replaced; operations resumed ~8:00 p.m. |
| Baltimore-Washington Intl (BWI) | Potomac TRACON | Late afternoon | Ground stop until ~8:00 p.m.; ground delay to at least 12:59 a.m. Sat |
| Ronald Reagan National (DCA) / Dulles (IAD) | Potomac TRACON | Late afternoon | Included in stop; resumed after site cleared |
The table above summarizes the known timing and the primary control facility. Precise counts of flights delayed or canceled were not available at publication; airline tallies typically update over several hours after operations resume.
Reactions & Quotes
“The FAA has temporarily stopped traffic … because of a strong chemical smell at the Potomac TRACON that is impacting some air traffic controllers.”
Federal Aviation Administration (official statement)
The FAA framed the action as a necessary pause to protect controller health and preserve safe operations while emergency teams investigated.
“Units responded to a reported potential chemical spill, with personnel experiencing mild symptoms from an odor in the building.”
Fauquier County Fire Rescue Chief Kalvyn Smith
Fauquier County officials emphasized that hazmat teams were deployed, the source was located, and no injured individuals required transport to hospitals.
“The flight was delayed almost three and a half hours.”
Traveler, interviewed by WBAL-TV
Passengers at BWI reported extended waits, both in terminals and on jetways, and crowded concession areas as people sought food and updates during the disruption.
Unconfirmed
- Nationwide tally of flights canceled or the total number of passengers affected remains unconfirmed pending aggregated airline and airport reports.
- Whether the contractor’s maintenance procedures fully complied with FAA facility protocols is not confirmed in public statements.
- Any longer-term equipment or process changes the FAA will require following this event have not been announced.
Bottom Line
A localized equipment failure—a circuit board overheating in a critical TRACON—triggered a safety-first response that temporarily halted traffic at several major East Coast airports and caused multi-hour delays for many travelers. The event underlines the sensitivity of air-traffic operations to single-point hardware issues and the importance of rapid hazmat and technical response to protect personnel and restore service.
While immediate operations were restored after crews replaced the component and evaluated staff, the passenger and airline impacts will likely ripple into subsequent schedules. Travelers should verify flight status with their carriers and allow extra time at airports in the hours following a control-facility outage.