As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
CREW REPORTS ACFT LAV SMOKE DETECTOR WENT OFF AND ELECTRIC ODOR WAS NOTED BY PASSENGER IN REAR OF ACFT. MAINTENANCE ISPECTED AND FOUND NO EVIDENCE OF ELECTRIC ODOR IN AIRCRAFT, FOUND AFT LAV SMOKE DETECTOR DIRTY. CLEANED AND OPS CHECKED GOOD. INSPECTED LAV AND LIGHTS, NO DEFECTS NOTED.