The Federal Aviation Administration says, there has been a "nationwide ground-stop for American Airlines."
The grounding order applies to all airports, according to the message.
The disruption will be unwelcome for a record number of Americans expected to travel across this holiday season. The Transportation Security Administration said it expects to screen nearly 40 million travelers from Dec. 19 to Jan. 2 -- a 6.2% increase from 2023.
American Airlines said it was expecting Dec. 27 and Dec. 20 to be its busiest and second-busiest days, respectively, during its holiday period, which began on Dec. 18.
