American Airlines experienced a significant operational disruption Tuesday evening as flights across the United States were grounded due to a widespread IT outage. The Federal Aviation Administration (FAA) issued an advisory confirming the nationwide ground stop, impacting both departing and arriving flights. The outage affected the airline's ability to manage its flight schedule, leading to the temporary halt of operations. While the exact cause of the IT issue remains unclear, American Airlines is working to resolve the problem and restore normal flight operations as quickly as possible. Passengers are advised to check their flight status for updates and potential delays. The carrier has not yet provided an estimate for when flights will resume. This incident highlights the critical reliance on technology within the aviation industry and the potential for large-scale disruptions when systems fail.