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. AMERICAN AIRLINES FLIGHT DIVERTED AFTER MYSTERY ODOR REPORTEDLY SICKENS CREWAccording to the updated FAA notices, CLT remains under restrictions as American Airlines works through a significant backlog of flights. Certain incoming American Airlines flights bound for Charlotte are being held at their origin airports because of heavy congestion. We apologize to our customers for the inconvenience," American Airlines said. CLICK HERE TO DOWNLOAD THE FOX NEWS APPTicker Security Last Change Change % AAL AMERICAN AIRLINES GROUP INC. 15.00 -0.94 -5.90%According to an FAA advisory, the nationwide ground stop began at approximately 6:29 p.m.