As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AFT LAVATORY SMOKE WARNING CAME ON DURING TAXI INTO THE GATE. FLIGHT ATTENDANT DID NOT OBSERVE ANY SMOKE OR FIRE BUT SAID THEY HAD SMELLED A BURNING SMELL. PERFORMED OPERATIONS CHECKED OF LAVATORY SMOKE DETECTION SYS IAW AMM 26-16-00. OPERATIONS CHECKED GOOD, NO FURTHER DEFECTS NOTED.