As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
WARNING MESSAGE FOR AFT LAVATORY SMOKE. RAN QRH AND WARNING WENT OUT AFTER BREAKERS WERE PULLED. PERFORMED AN AFT LAVATORY VISUAL INSPECTION, NO ABNORMALITIES NOTED. LAVATORY WASTE CAN NOTED EMPTY. NO ABNORMAL ODORS IN LAVATORY. RESET CIRCUIT BREAKERS CBP1-B8, CBP2 D8, M9, AND M10. PREFORMED OPS TEST OF THE LAVATORY SMOKE DETECTOR IAW AMM 26-16-00. ALL CHECKED GOOD. PREFORMED ASCS 1/2 LRU TEST VIA MDC SYS. CHECKED OK. UNABLE TO DUBLICATE.