NTSB: LaGuardia System Failed to Predict Air Canada-Fire Truck Collision

The National Transportation Safety Board released a preliminary report April 25 revealing how LaGuardia Airport's collision avoidance system failed to prevent a fatal crash between an Air Canada Express jet and a fire truck.

The Airport Surface Detection Equipment (ASDE-X) could not alert air traffic controllers to the potential conflict because the seven responding fire trucks lacked transponders, preventing reliable position tracking. According to the report, runway entrance lights remained illuminated until approximately three seconds before impact, when the lead fire truck reached the runway edge. Controllers issued multiple "stop" warnings, but the truck operator only realized the danger once already on Runway 4.

Air Canada Express Flight 8646 crashed March 15, killing both pilots aboard the Bombardier CRJ-900. The system's inability to distinguish merging radar targets meant it could not predict the conflict. While investigators continue analyzing whether runway lights and controller actions contributed to the outcome, the preliminary findings highlight significant gaps in ground vehicle tracking at major airports.