The Federal Aviation Administration has issued a nationwide ground stop for all because of a communication issue affecting all , US Transportation Secretary Sean Duffy said on Friday.




“FAA technicians are investigating the issue,” Duffy said in a social media post.




“Users can expect airborne holding to any and all airports within the National Airspace System due equipment outages,” the said.




The ground stop was ordered “due to extraordinary circumstances and for reasons of safety”. International flights will be handled on a case-by-case basis.




“Traffic should remain ground stopped until further notice,” the FAA said in an advisory.




Air Route Traffic Control Centers are regional facilities that manage flights travelling across the country.




The last nationwide ground stop took place in January 2023 after a pilot notification system went down. Before that, the previous nationwide ground stop was issued after the September 11, 2001, attacks.