As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
(CAN) CLIMBING WHEN THE FWD LAVATORY FIRE ALERT ACTIVATED. THE CREW DECIDED TO RETURN FOR A SAFE LANDING. A PAX REPORTED ODOR OF SMOKE ON BOARD, A FIRE ALERT WAS HEARD FROM THE FWD LAVATORY. THE CAPTAIN ANNOUNCED THERE WAS AN UNIDENTIFIED PROBLEM WITH A FIRE ALARM UNIT & RETURNED, WHERE FIREFIGHTERS CAME ON BOARD TO CHECK THE CABIN.