Thousands of U.S. flights were delayed or canceled Wednesday morning after the Federal Aviation Administration suffered an outage of the system that sends messages to pilots.
The FAA said early Wednesday domestic departures would be paused until at least 9 a.m. ET while the agency worked to restore the Notice to Air Missions System. All flights currently in the air were safe to land, the agency said.
More than 3,700 U.S. flights were delayed as of 8:30 a.m. ET, according to FlightAware, and residual delays could last hours from the backup once the ground stop is lifted, CNBC reports.
By 8:15 a.m. ET, flights were resuming out of Newark Liberty International Airport and Atlanta Hartsfield-Jackson International Airport, the FAA said.
“This technology issue is causing significant operational delays across the National Airspace System,” said Airlines for America, an industry group that represents major U.S. carriers, including Delta
The White House said Transportation Secretary Pete Buttigieg had briefed President Joe Biden on the outage. “There is no evidence of a cyberattack at this point, but the President directed DOT to conduct a full investigation into the causes,” White House press secretary Karine Jean-Pierre said in a tweet.
The incident comes just weeks after bad weather during the busy holiday travel period prompted mass flight disruptions across the U.S. and days later, more than 15,000 Southwest flight cancellations after the carrier buckled from all the schedule changes.
Southwest is preparing to cancel flights on Wednesday to avoid further disruption, Casey Murray, president of the Southwest Airlines Pilots Association, told CNBC.
Shares of Southwest were about 1% lower in premarket trading Wednesday. Shares of other major airlines were little changed.