As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
BURNING ODOR IN CABIN. LAVATORY SMOKE DETECTOR FS3 AUDIBLE ALERT WITH BURNING PAPER ODOR AND FLIGHT ATTENDANT REPORTED ELECTRICAL WIRING ODOR. EMERGENCY DECLARED, RETURNED TO DEPARTURE, AND LANDED WITHOUT INCIDENT. INSPECTED LAVATORY FOR FIRE OR SMOKE, NO DISCREPANCIES NOTED. SMOKE DETECTOR CHECKED OK IAW AMM 26-13-00. OPERATIONAL CHECK GOOD.