As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING CRUISE FA'S CALLED AND REPORTED A SMOKE SMELL. THE SMELL WAS ALSO NOTED IN THE COCKPIT FA'S DETERMINED IT WAS THE FWD LAV HEATER THE HEATER WAS TURNED OFF THE SMELL WENT AWAY. VISIBLE SMOKE WAS NOTED AROUND THE HEATER AREA. FA'S SAID THE HEATER WAS SO HOT THEY COULD NOT TOUCH / REMOVED AND REPLACED FWD LAV WATER HEATER OPS & LEAK TEST GOOD REF AMM 38-12-16 A/C OK FOR SERVICE"