Row of American Airlines Planes on Tarmac

FILE - In this April 24, 2019, photo, American Airlines aircraft are shown parked at their gates at Miami International Airport in Miami. 

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LOUISVILLE, Ky. (WDRB) -- A technical issue that briefly grounded American Airlines flights nationwide on Tuesday did delay a few flights in Louisville. 

Louisville Regional Airport Authority spokeswoman Natalie Chaudoin told WDRB that there were six American flights at Louisville Muhammad Ali International Airport that were impacted by IT issues. 

Chaudoin said, "All have since departed but were delayed in doing so. They were going to Charlotte, Chicago-O’Hare, Dallas-Fort Worth, Philadelphia and two flights to Miami."

American Airlines briefly grounded flights nationwide Tuesday due to a technical issue just as the Christmas travel season kicks into high gear.

American flights were cleared to fly by federal regulators about one hour after a national ground stop order was issued by federal regulators.

Just before 7 a.m. Eastern time, the Federal Aviation Administration ordered all American Airlines flights grounded in the U.S. at the airline’s request. American had reported a technical issue affecting its entire system with millions traveling for the holiday.

The ground stop, according to the time stamps on the FAA's orders, lasted exactly one hour.

The groundings couldn't come at a worse time for the millions of travelers expected to fly over the next 10 days. The Transportation Security Administration expects to screen 40 million passengers over the holidays and through January 2.

Many flights during the holidays are sold out, which makes cancellations even more disruptive than during slower periods. Even with just a brief outage, the cancellations have a cascading effect that can take days to clear up.

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