As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
THE AIRCRAFT WAS NOT GROUNDED. LAVATORY SMOKE DETECTION SYSTEM CHIMES GOING OFF ERRACTICALLY FROM FORWARD LAVATORY POSITION. CHECKED AND APPROVED FOR DEFERRAL PER MEL REF 26-6. MAINTENANCE REPLACED THE FORWARD LAV SMOKE DETECTOR PER AMM 26-11-00, CHECKS GOOD.