COLUMBUS, Ohio (WCMH) – The FAA grounded all flights nationwide Wednesday morning. A source told NBC News that the shutdown was due to a computer system issue, though it did not initially confirm how much of an impact it had on travelers at John Glenn International Airport.

An advisory to pilots and airports from the FAA said it systems failed and it estimated delays would be in effect until at least 10 a.m. By 8:50 a.m. the FAA announced that the ground stop had been lifted and it will continue to investigate the cause of the system outage. The outage could impact departures and arrivals throughout the day.

“The FAA is working to restore its Notice to Air Missions System,” an FAA spokesperson wrote Wednesday on Twitter. “We are performing final validation checks and reloading the system now. Operations across the National Airspace System are affected. We will provide frequent updates as we make progress.”

In an additional update sent at 7:19 a.m., the FAA said it was “still working to fully restore Notice to Air Missions system following an outage. The 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.”

“We are seeing some delays this morning and encourage passengers to check with their airline for the latest flight information,” said Sarah McQuade, Communications and Marketing Manager at Columbus Regional Airport Authority.

NBC4 spoke with Bryn Reagan, who was supposed to come back to Columbus this morning on a flight from Charlotte, North Carolina. “I was supposed to fly out at 9 a.m. and I won’t be able to fly out until 7:15 p.m., so I’ll be hanging out in Charlotte all day,” said Reagan.

She did secure another flight back to Ohio and is hoping another delay won’t be coming. “At this point I’m just going to see what happens — I feel like if there’s another delay, I’m just going to expect it to happen and kind of see where the day takes me from there.”

FlightAware showed that locally Columbus experienced 69 delays with 17 cancellations by 10:30 a.m.

United Airlines also confirmed nationwide delays in air travel via Twitter, and NBC4’s Matthew Herchik reported delays between one and three hours at John Glenn International Airport Wednesday morning.

“The FAA system that sends out important real-time flight hazards & restrictions to all commercial airline pilots – Notice to Air Missions (NOTAM) – is currently suffering a nationwide outage,” tweeted United. “United has temporarily delayed all domestic flights and will issue an update when we learn more from the FAA”

The cause of the outage is still being investigating with aviation experts curious to discover what happened. “This is going to have some long-lasting impacts for the next 24 maybe even a little be longer hours,” said Brian Strzempkowski, the interim director of the center of Aviation studies at Ohio State. “If you think of those snow events or massive weather events where a whole region of the country gets impacted, and flights can’t move in and out of that region — you’re just seeing this on a national scale.”

He says ‘NATOM’ alerts pilots to critical information about airspace. “I am absolutely interested to learn on this, and I can see some future examples in classes and future assignments built around this one,” Strzempkowski.