US flights suffered a disruption on Wednesday due to a Federal Aviation Administration outage in the system that helps communicate with the pilots and alert them of any danger or changes in airport facilities.

More than 1200 flights were affected by this and were consequently delayed by 7:25 a.m. ET, reports FlightAware.

Also Read| FAA system outage causes all flights in US to be grounded

FAA has now ordered domestic flight departures to be halted until 9 a.m. ET, Wednesday.

“Arriving and departing passengers can expect delays this morning and throughout the day,” Austin-Bergstrom International Airport said on Twitter.

Also Read| What is Notice To Air Mission System or NOTAM?

“This technology issue is causing significant operational delays across the National Airspace System,” said Airlines of America, a group representing majority of US flights like Delta, American, United, Southwest among others. 

FAA had issued an advisory on its website earlier, informing that NOTAM (Notice to Air Missions) system had failed. There is no estimate as to when the system would start working, the website said, but the NOTAMs issued before this outage were still viewable.

White House Press Secretary Karine Jean-Pierre, on her twitter handle, said that President Joe Biden has been informed of this outage. She further said that although there is no evidence of a cyber attack yet, the president has ordered DOT to “conduct a full investigation on the causes.” 

Also Read| ‘No evidence of cyberattack’ in FAA system outage, says White House

The website defines NOTAM as a “notice containing information essential to personnel concerned with flight operations but not known far enough in advance to be publicized by other means.”

Without the NOTAM system in function, airplanes are at a risk of certain air hazards like birds, parachutes, air shows and more. They might remain unaware of runway conditions also.