US Flight Ground Stop Linked to Telecom System Update

What Happened

The longest halt in U.S. flight departures since the September 11 attacks happened after updates to a telecommunications system managed by L3Harris Technologies. Transportation Secretary Sean Duffy stated that the upgrades at a remote location were part of a shift from copper wires to fiber optics. A router flooded other air traffic control routers with over 1,000 connection attempts every five seconds. This caused problems with radar feeds and airplane communications. Federal Aviation Administration head Bryan Bedford said there was zero evidence of anything nefarious or related to artificial intelligence. Officials were unsure of the cause for about 45 minutes.

Impact and Travel Delays

The ground stop lasted more than four hours on Friday and forced many planes to divert or park without gate space. More than 6,000 U.S. flights were canceled and close to 7,100 were delayed on Saturday. This followed about 9,000 cancellations and 7,000 delays on Friday, though some disruptions were caused by bad weather. Around 3 million people were scheduled to fly on Saturday. Airlines deployed spare planes and crews while offering extra or double pay to flight attendants and pilots to help clear the backlog before the Thanksgiving holiday. Sports teams also struggled to travel, with the SEC moving some games to Sunday and the NFL reassigning referees.

Context

Secretary Duffy used the incident to seek billions of dollars from lawmakers to modernize aging U.S. air traffic control infrastructure. The United States manages the busiest airspace in the world, which relies on sections of equipment that officials have long struggled to replace. L3Harris stated it has finished more than 70% of the switch to fiber-optic systems and is cooperating with the FAA investigation.