As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
LAVATORY SMOKE LIGHT AND WARNING BEEPER CAME ON DURING DESCENT POINT, NO EVIDENCE OR ODOR. MAINTENANCE REPLACED THE SMOKE DETECTOR IN THE LAVATORY IAW AMM 26-14-01, AND PERFORMED A SATISFACTORY OPERATIONAL CHECK IAW AMM 26-14-00. MAINTENANCE ALSO PERFORMED SATISFACTORY OPERATIONAL CHECK OF THE AFT LAVATORIES IAW AMM 26-14-00.