As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ON LANDING IN YYZ,FORWARD ATTENDANTS SEAT BELT CAME FREE OF THE ATTACH BRACKET. UPON INVESTIGATION IT WAS FOUND THAT A WASHER WAS MISSING FROM THE RETAINING BOLT. THIS MISSING WASHER WAS LEFT OFF THE BOLT AT INSTALLATION BY A PREVIOUS OPERATOR.