US nationwide ground stop caused by air traffic control communications failure

The Federal Aviation Administration issued a nationwide ground stop for all United States flights on Saturday following a communications failure at air traffic control centers. The disruption, which began at 3:36 p.m. Eastern Time, lasted approximately 4 hours and 22 minutes before airspace reopened at 8:15 p.m. Eastern Time. The outage affected a telecommunications network overseen by L3Harris Technologies and was caused by overloaded routers and switches. According to CBS News, the outage resulted from a failed update to the Federal Aviation Administration telecommunications network.

Impact on flight operations and passengers

The shutdown caused significant disruption to air travel across the country. Data from FlightRadar24 indicated that more than 6,600 flights were canceled and 8,600 flights were delayed. An additional 1,500 flights scheduled for Sunday were also canceled. Tens of thousands of passengers were stranded at airports throughout the nation. During the outage, 3,500 aircraft landed safely following standard procedures. At the lowest point of the outage, 336 planes remained in the air over the lower 48 states, compared to 4,266 planes in the air when the disruption began.

Some airlines have adjusted their schedules to manage the backlog. Southwest and JetBlue canceled the remainder of their flight schedules for the night, while JetBlue is canceling some Saturday flights. Total travelers grounded during the event is estimated at 633,000.

Government response and investigation

United States Secretary of Transportation Sean Duffy and United States Secretary of Homeland Security Markwayne Mullin met with President Donald Trump in the Oval Office to discuss the outage. Secretary Markwayne Mullin stated that there is no evidence of a cyberattack or rogue AI. The National Security Agency is currently working with the Department of Homeland Security on the investigation.

The air traffic control system has faced ongoing strain due to aging technology and a shortage of several thousand controllers. This shutdown represents the longest nationwide shutdown since the September 11, 2001, attacks. Secretary Sean Duffy noted that the recovery of normal operations will be slow and stated that the system needs funding to prevent similar outages. Secretary Sean Duffy has requested $50 billion for aviation modernization, following a previous request of $30.1 billion by the White House and the Department of Transportation for infrastructure upgrades.

Glossary

• ground stop — A ground stop or ground delay is an action issued by the FAA. It can be issued for several hubs due to an equipment outage.
• air traffic control — The air traffic control system is run by the Brazilian Air Force (FAB). It includes approach controls, control towers, and air traffic control centers known as Integrated Air Traffic Control and Air Defense Centers (CINDACTA).
• L3Harris Technologies — L3Harris Technologies Inc is a company with the stock ticker "LHX." It is traded on a specific exchange.
• Secretary of Transportation — The Secretary of Transportation is a government official. Sean Duffy is the United States Secretary of Transportation.
• Secretary of Homeland Security — The Secretary of Homeland Security is a government official. Markwayne Mullin is the United States Secretary of Homeland Security.