As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
CREW REPORTED FWD LAV SMOKE DETECTED INDICATION ON EICAS DURING CLIMBOUT OF YUL, DECLARED AN EMERGENCY AND RETURNED TO FIELD TO YUL. A/C LANDED WITHOUT INCIDENT, AND CREW REPORTED NO VISIBLE SMOKE WAS DETECTED. MAINTENANCE PLACED FWD LAV ON MEL 26-14-00-1. MAINTENANCE REMOVED AND REPLACED FWD LAV SMOKE DETECTOR PER EMB AMM ON 2/10/12.