A telecommunications outage affecting regional air traffic control centres disrupted air travel across the United States on Friday, prompting the Federal Aviation Administration (FAA) to order a nationwide halt to flight departures.
What caused the nationwide FAA communication outage
The disruption was caused by overloaded switches and routers in an ageing air traffic control communications system, US transportation secretary Sean Duffy said at a White House briefing.The system became overloaded with data and began transmitting inconsistent information, triggering intermittent communication and radar failures.“Our switches, our routers, actually got overloaded with data… They started to give us inconsistency in the data … and because of that, we shut the system down,” Duffy said.According to an airline source cited by CNN, the network router problem spread across the country, affecting communications at multiple air traffic control facilities. The FAA said the ground stop was imposed “due to extraordinary circumstances and for reasons of safety”.The telecommunications failure affected all 22 regional air route traffic control centres responsible for directing aircraft across the US.The disruption raised concerns over air traffic controllers’ ability to communicate reliably with pilots, prompting the FAA to suspend departures as a precautionary measure.
Was FAA outage caused by a cyberattack?
US officials said there was no indication so far that the communications failure was the result of a deliberate attack.US President Donald Trump said the disruption was unlikely to have been caused by a cyberattack or artificial intelligence. Homeland security secretary Markwayne Mullin also said preliminary assessments did not point to a national security threat.“This isn’t the same comparison to 9/11,” Mullin told reporters outside the White House, adding that all flights had been accounted for and passengers were safe.“There is no indication that we’ve had, no reason to believe, that as of right now this was a threat to the United States,” he said.Preliminary reports also indicated that the incident was not a cyberattack, law enforcement sources told CNN. However, authorities continued to examine the cause of the outage and had not ruled out any possibilities.Mullin also dismissed a connection between the FAA disruption and a major Microsoft services outage reported earlier in the week.
How many passengers and flights have been affected?
More than 4,000 flights were cancelled and over 10,000 delayed across the US following the nationwide ground stop.The disruption grounded flights at airports across the country, leaving an estimated 1.5 million passengers stranded, according to an analysis by data firm Cirium cited by CNN.As flights already in the air continued towards their destinations and landed, the number of aircraft operating across US skies began to decline.With no clear timeline for restoring normal operations, major US airlines were also considering shutting down flight operations for the evening, an airline source told CNN.The impact extended beyond US domestic travel. Air Canada said flights between Canada, the Caribbean and South America that transit US airspace could also be affected by the disruption.
What happens next?
Transportation secretary Sean Duffy warned that further disruptions to air travel were likely unless the country’s ageing air traffic control systems were modernised. He urged Congress to approve legislation providing additional funding to upgrade the infrastructure.“You will have more of them unless the American people and the Congress tell us to build, and I can’t wait for that,” Duffy said.The FAA and other federal authorities continued working to identify the cause of the telecommunications failure and restore normal operations.However, with no definite timeline for resolution, airlines were preparing for an extended disruption. Passengers were advised to check with their carriers for updates before heading to airports.Trump had been briefed on the situation, while Mullin said the administration was coordinating the response to ensure officials had the necessary resources.The authority later lifted the nationwide ground stop. However, thousands of passengers continued to face travel chaos in what was one of the largest flight disruptions in recent history.
