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By Pete Muntean and Gregory Wallace, CNN
(CNN) – The United States was facing another major aviation disruption on Wednesday as the Federal Aviation Administration ordered a halt to all domestic flight departures after the system providing pilots with pre-flight safety notices went offline.
The FAA said in a statement it had ordered airlines to pause all domestic departures until 9 a.m. Eastern Time while it tried to restore its NOTAMS – or Notice to Air Missions – system.
“We are performing final validation checks and repopulating the system now,” an earlier FAA statement said. “Operations across the National Airspace System are affected. We will provide frequent updates as we make progress.”
\u201cUpdate 3: The FAA is still working to fully restore the Notice to Air Missions system following an outage.\n\nThe FAA has ordered airlines to pause all domestic departures until 9 a.m. Eastern Time to allow the agency to validate the integrity of flight and safety information.\u201d— The FAA \u2708\ufe0f (@The FAA \u2708\ufe0f) 1673436544
The association representing US airlines, Airlines for America says the outage is “causing significant operational delays.”
United Airlines said it has temporarily delayed all domestic flights.
American Airlines said in a statement it is “closely monitoring the situation, which impacts all airlines, and working with the FAA to minimize disruption to our operation and customers.”
The NOTAMS system that is experiencing the outage provides “critical flight safety operation information,” the airline said.
US Transportation Secretary Pete Buttigieg tweeted: “I have been in touch with FAA this morning about an outage affecting a key system for providing safety information to pilots. FAA is working to resolve this issue swiftly and safely so that air traffic can resume normal operations, and will continue to provide updates.”
\u201cI have been in touch with FAA this morning about an outage affecting a key system for providing safety information to pilots. FAA is working to resolve this issue swiftly and safely so that air traffic can resume normal operations, and will continue to provide updates.\u201d— Secretary Pete Buttigieg (@Secretary Pete Buttigieg) 1673438500
US President Joe Biden was also briefed on the situation, according to White House Press Secretary Karine Jean-Pierre.
FlightAware, which tracks delays and cancellations, showed nearly 2,512 flights to, from and within the United States as being delayed as of 7:45 am ET, but only 126 flights canceled so far.
International flights bound for the United States were continuing to take off from Amsterdam and Paris despite the situation. A Schiphol Airport spokesperson told CNN that “a workaround had been issued” and flights were still departing from Amsterdam.
No flights have been canceled from Paris’ Charles de Gaulle airport, but delays were expected, according to the airport’s press office. Frankfurt Airport also told CNN it had not been impacted.
A London Heathrow Airport spokesperson told CNN that they were “not aware of canceled flights and that flights to the US had left recently.”
Commercial airline pilots use NOTAMS for real-time information on flight hazards and restrictions. The FAA stipulates NOTAMS are not to be relied on as a sole source of information, and so some flights may be able to satisfy safety requirements by using other data.
Wednesday’s incident is the second significant crisis to hit US aviation in a matter of weeks. A huge winter storm over the end-of-year holidays caused extensive disruption and helped trigger a Southwest Airlines meltdown that affected thousands of passengers.
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