What to know about the rare nationwide ground stop issued by the FAA

The US Federal Aviation Administration announced a nationwide ground stop for all airports in the United States on Friday, citing "extraordinary circumstances" and "for reasons of safety." This unprecedented measure was taken following communication issues affecting multiple Air Route Traffic Control Centres. All departing aircraft were instructed to remain grounded until further notice, while inbound international flights would be managed on a case-by-case basis.

The FAA's technicians are currently investigating the issue. Transportation Secretary Sean Duffy stated that the nationwide ground stop was issued after a communication issue impacted all Air Route Traffic Control Centres. This latest disruption highlights the ongoing challenges faced by the US air traffic control system, which has suffered from equipment failures, communications problems, and a shortage of controllers while the FAA works to replace aging infrastructure.

Congress approved $12.5 billion for the system's overhaul last year, and the FAA and the White House have requested an additional $30.1 billion. Shortly before the nationwide ground stop was announced, the FAA had halted traffic in Chicago due to similar communication issues. Nationwide ground stops are incredibly rare, with the last one occurring in January 2023 following a pilot system failure and another during the September 11, 2001 terror attacks.