As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING AIRCRAFT OPERATION, A LAVATORY SMOKE INDICATION WAS REPORTED BY THE FLIGHT CREW. THE SMOKE DETECTOR WAS FOUND TO BE INOPERATIVE AND WAS REPLACED. A SATISFACTORY OPERATIONAL CHECK WAS PERFORMED AND AIRCRAFT WAS RELEASED FOR CONTINUED SERVICE.