One Software Reboot Grounded All US Flights for Hours

A nationwide FAA ground stop on Friday froze departures at every U.S. airport for roughly four hours after a telecommunications network tied to America's air traffic control system crashed following an update and reboot, according to American Partisan.

Snapshot

The FAA halted all departing flights nationwide starting around 4:00 p.m. EST, letting airborne planes continue to their destinations while grounding everything else. The stop was lifted at 8:19 p.m. EST, but American Partisan reports it was only the second full nationwide ground stop since 9/11, and airlines were still digging out of more than 1,000 cancellations and 10,000 delays.

Key points

• What triggered it: CBS News reporting cited in the article says an update to a private telecom network run by L3Harris Technologies caused the FAA's communications infrastructure to reboot and then crash.
• Not an attack: DHS Secretary Markwayne Mullin said it was a telecommunications outage with no sign of a "nefarious attack," calling it "not another 9/11," though he said a fix could take "some time" and wouldn't rule out an AI link.
• Scale of the hit: FlightAware data cited in the piece showed over 1,100 flights canceled and nearly 10,000 delayed, with roughly 11,000 more still scheduled to depart that day.
• Not fully resolved: JetBlue warned passengers disruptions would stretch into the next morning, and the article notes recovery could run into Saturday.
• Historical rarity: The last comparable nationwide stop was the January 2023 NOTAM system failure, which lasted about 90 minutes versus this four-hour outage.

Quick take

This is a reminder of how fragile centralized infrastructure can be. A single network reboot took down departures at every airport in the country for hours, with ripple effects lasting into the next day. It's worth remembering that comms and logistics systems you rely on, whether for travel or supply chains, can fail without warning and without any bad actor involved.

Read the full story: americanpartisan.org