The Delta plane had been given takeoff clearance, and the American plane accidentally taxied to the wrong runway. In the process, the American 777 crossed the runway that was being used for takeoffs, where the Delta plane was accelerating. Fortunately the air traffic controller quickly noticed what was going on, and the Delta pilots promptly aborted the takeoff, preventing potential disaster. The big question has been how the American 777 pilots could make a mistake like this, not only taxiing to the wrong runway, but crossing an active runway without permission. When American introduced these new cockpit safety procedures at the beginning of the year, the Allied Pilots Association (the union representing American pilots) warned of the safety risks of doing this.

Source: Forbes January 21, 2023 17:27 UTC