Read our Privacy noticeAll American Airlines flights were temporarily grounded Tuesday after a nationwide IT outage. Connectivity has been fully restored,” an American Airlines spokesperson told The Independent Tuesday night. open image in gallery All American Airlines flights were temporarily grounded Tuesday after a nationwide IT outage ( AFP via Getty Images )There were more than 1,500 reports of issues with American Airlines’ systems at around 6:30 ET, according to Downdetector. There were more than 1,300 flight delays from American Airlines by Tuesday night, according to FlightAware. In March, all JetBlue flights were temporarily grounded due to a “system outage,” the New York City-based carrier said at the time.