US Flight Ground Stop: Trump Briefed Within 30 Minutes as FAA Disruption Stranded Travellers

President Donald Trump was briefed within 30 minutes of the Federal Aviation Administration (FAA) imposing a nationwide ground stop on Friday, as a communications failure disrupted air travel across the United States and left thousands of passengers stranded.

The FAA announced the grounding at 3:36 p.m. Eastern Time, when approximately 3,500 aircraft were already airborne. Within minutes, several federal agencies, including the FBI, Department of Homeland Security, Department of Justice, Department of Defense, National Intelligence Directorate, US Cyber Command and Federal Emergency Management Agency, began coordinating their response.

Transportation Secretary Sean Duffy said at 4:16 p.m. ET that the ground stop was necessary because of a communication issue affecting all Air Route Traffic Control Centres. FAA technicians immediately began investigating the disruption, while the White House convened an interagency call to establish what had happened and coordinate a response.

The intelligence community conducted preliminary checks for signs of malicious activity, including suspicious communications and electronic signals. Officials found no indications of nefarious activity, according to US sources.

Senior staff briefed Trump while he was attending an economic policy meeting. His instructions were subsequently relayed to officials participating in the multi-agency response call, which was led by White House Chief of Staff Stephen Miller.

Trump later met with Duffy and Homeland Security Secretary Markwayne Mullin. He also began contacting congressional leaders to seek additional funding for FAA modernisation. The White House’s congressional affairs team separately engaged key lawmakers on upgrading the country’s air traffic control infrastructure.

The Homeland Security Council has invited government officials and outside stakeholders to a meeting on Monday to discuss the disruption, identify preventive measures and determine the next steps for modernisation efforts.

Not all aircraft were grounded during the four-hour disruption. Medical service flights received clearance to continue to their intended destinations.

The grounding was lifted after officials identified the system problem. According to FlightAware, approximately 9,159 flights were cancelled and 7,190 delayed across the United States on Friday.

At a news conference on Saturday, Duffy said the disruption apparently began during maintenance work by FAA telecommunications contractor L3Harris Technologies at a remote facility. The work involved replacing ageing copper communications lines with fibre-optic connections.

During the maintenance process, a router reportedly generated more than 1,000 connection attempts every four to five seconds, overwhelming routers across the FAA’s network and disrupting communications between air traffic control centres.

Duffy and Mullin were also more than 30 minutes late for a scheduled 7:45 p.m. ET news conference on Friday. Officials said they delayed the appearance because they were close to resolving the disruption and did not want to interrupt efforts to lift the ground stop.

Although federal officials have identified a likely sequence of events behind the nationwide disruption, questions remain about the precise technical cause of the systemwide failure and how similar incidents can be prevented.