As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
PILOT REPORTED THAT DURING ARROACH AT 4000FT, RECEIVED A SMOKE MASTER WARNING FOR THE AFT LAVATORY. STAYED ON EVEN AFTER LANDING, COMPLIED WITH QRH. RESET THE CONNECTOR AND PERFORMED AND OPS CHECKED GOOD. ACFT WAS APPROVED FOR RETURN TO SERVICE.