GoKawiilDuffy says routine fiber-optic upgrade by L3Harris caused nationwide FAA ground stop
Transportation Secretary Sean Duffy said a nationwide flight ground stop was triggered when contractor L3Harris upgraded copper wire to fiber optic cable at a remote FAA site, causing a router to overload a critical communication system. FAA acting CTO Rebecca Guy said the network was being pinged at roughly a thousand connections every four to five seconds before officials disabled the sources and stabilized the system. Cirium reported over 8,200 flights canceled Friday evening, with roughly 3,000 more cancellations after the stop was lifted.