**Incident Overview** On Saturday, 16 May 2026, a Croatia Airlines Airbus A220-300 operating flight OU412 from Split (SPU) to Frankfurt (FRA) experienced a runway excursion during a rejected takeoff. The aircraft, registration 9A-CAN, had 130 passengers and five crew members on board. The crew rejected the takeoff at a speed exceeding 120 knots, close to rotation speed, after the aircraft began to veer left. Despite heavy braking, the left main landing gear left the paved surface and the aircraft came to rest on the grass alongside the runway, approximately 1,800 metres from the threshold. All occupants were evacuated via mobile stairs with no injuries reported. **Aircraft Damage and Operational Impact** The A220 struck at least one vertical sign and several runway edge lights, causing visible damage to the engine cowling and landing gear. The Croatian Transport Accident Investigation Agency classified the event as a "serious incident." The aircraft will require thorough technical inspections before being returned to service. The airport suspended operations for several hours, leading to cancellations, diversions, and significant delays, particularly challenging as the Dalmatian coast approaches peak tourist season. **Investigation and Relevance to Aviation Training** An investigation has been opened by the Croatian Air Accident Investigation Agency (AIN), working with the national regulator, Croatia Airlines, Split Airport, and manufacturers. Flight data and cockpit voice recorders (FDR and CVR) will be analysed to reconstruct the takeoff sequence. For ATPL and ATC students, this incident highlights critical safety procedures: the decision-making process for a rejected takeoff at high speed, the importance of maintaining directional control during an abort, and the coordination required between flight crew and ATC during an emergency. It also underscores the operational consequences of a runway excursion, including airport closure and traffic management. Understanding such events is vital for future pilots and controllers to enhance safety in real-world operations.