The Federal Aviation Administration (FAA) issued an updated advisory Tuesday evening scaling back the nationwide ground stop on American Airlines flights after a systemwide IT outage disrupted operations across the carrier’s network.

The revised FAA advisory limited restrictions to Charlotte Douglas International Airport (CLT) in North Carolina, one of the airline’s largest hubs, indicating that the nationwide order had been lifted and allowing most American Airlines flights to resume.

American Airlines also said system "connectivity has been fully restored" and that flights were "departing again."

"A technology issue briefly impacted connectivity for some of our systems on Tuesday evening," the airline said. "Connectivity has been fully restored. We apologize to our customers for the inconvenience. We appreciate the efforts of our team to bring our systems back online so quickly and take care of our customers."

According to the updated FAA notices, CLT remained under restrictions as American Airlines worked through a significant backlog of flights. The hub’s role in the network meant the disruption was not just a point-to-point delay problem, but an operations issue that had to be cleared before departures and connections could normalize.

Some incoming American Airlines flights bound for Charlotte were being held at their origin airports because of heavy congestion.

Ground delays for flights arriving in Charlotte increased sharply, with average delays rising from 24 minutes to 49 minutes. The notice said many flights could face substantially longer delays.

The FAA also said there was a 30% to 60% chance the localized ground stop in Charlotte would be extended beyond its scheduled end time.

American Airlines had earlier acknowledged the outage and said its IT team was working to restore affected systems as quickly as possible.

"We put a temporary ground stop in place while our teams worked to resolve the issue. We apologize to our customers for the inconvenience," American Airlines said.

"Our team's working hard to get everyone back on track asap, and we're sorry for the inconvenience," the carrier added.

The airline has not said what caused the outage, leaving the immediate focus on restoring operations and clearing the Charlotte backlog while the broader network remained open.

According to an FAA advisory, the nationwide ground stop began at approximately 6:29 p.m. ET and affected American Airlines and its regional affiliates.