As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
RECEIVED SMOKE TOILET AMBER CAS MESSAGE IN FLIGHT. COMPLIED WITH "QRH" NO EVIDENCE OF SMOKE OR FUMES EVIDENT. RECEIVED AT CRUISE FL 290 MESSAGE POSTS INTERMITTENTLY ON GROUND. R & R LAVATORY SMOKE DETECTOR IAW AMM 26-16-01. OPS CHECKED GOOD.