An Air Canada Boeing 737 MAX 8 (C-GEOJ) operating Flight AC774 from Los Angeles vacated taxiway B3 at Montreal-Trudeau International Airport on 9 July 2026, failing to turn onto taxiway B and entering the grass at 55 knots ground speed. The aircraft sustained a runway excursion post-landing but did not crash, with all 162 occupants deplaning safely via buses. Operational delays ensued as the north runway closed temporarily and emergency coordination centers activated. The incident marks the first taxiway excursion for an Air Canada 737 MAX at YUL in 2026, prompting a full inspection and investigation into potential landing gear issues or pilot error. No injuries occurred despite the aircraft ending on rough ground.