On January 11, 2023, U.S. flights were grounded or delayed as the Federal Aviation Administration (FAA) attempted to fix a system outage.

[1] The outage was the first time since September 11, 2001, that the FAA issued a nationwide ground stop in the United States.

ET, and FAA issued the first Air Traffic Control System Command Center Advisory about this incident at 7:47 p.m.

ET on January 11, the FAA ordered airlines to pause all domestic departures after its pilot-alerting Notice to Air Missions (NOTAM) system went offline overnight,[5] causing extensive disruption.

The White House said there was no evidence of a cyberattack in relation to the system outage, but the president has asked for an investigation.

[13] House Transportation Committee Chair Sam Graves (R-MO) and Rick Larsen (D-WA) stated that the committee intended to conduct vigorous oversight of the Department of Transportation's plan to prevent such disruption from happening again.