As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
(CAN) DURING TAXI, THE BAGGAGE COMPARTMENT SMOKE DETECTOR WARNING CAME ON. THE FLIGHT CREW SHUT DOWN AND EVACUATED THE AIRCRAFT. MAINTENANCE FOUND MOISTURE ON THE SMOKE DETECTOR AND CANNON PLUG. THEY DETERMINED THE MOISTURE CAME FROM SNOW WHICH HAD BLOWN INTO THE BAGGAGE COMPARTMENT DURING LOADING OPERATIONS.