As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
CREW REPORTED A CIDS CAUTION LIGHT ON WITH ASSOCIATED LAVATORY SMOKE. WARNING DISAPPEARED BUT CAUTION LIGHT STILL ON. CHANGED FWD & AFT LAVATORY SMOKE DETECTOR FILTERS, NO FAULTS. CIDS CAUTION LIGHTS ON FLIGHT ATTENDANT PANEL DUE TO AFT DRAIN MAST INOPERATIVE & ON MEL 30-71-01A.