As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AIRCRAFT WAS NOT GROUNDED: LAV 3F-1R NEAR 3R DOOR SMOKE DETECTOR SOUNDS THE SMOKE ALARM AND ENGINE INDICATING AND CREW ALERTING SYSTEM MESSAGE "SMOKE IN LAVATORY" COMES ON CONTINUOUSLY. NO SMOKE VERIFIED BY CABIN CREW. SUPPLEMENTAL REPORT REQUIRED (OPEN)