As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
MCO - INFLIGHT T2226/16 HAZY SMOKE AND SHARP ELECTRICAL WIRE BURNING SMELL COMING FROM FIRST CLASS LAVATORY WAS REPORTED 40 MINUTES AFTER TAKEOFF. PERFORMED QRH SMOKE PROCEDURE AND SMOKE AND SMELL DISSIPATED. FOUND FORWARD LAVATORY WATER TANK SHORTING. PLACARD FORWARD LAVATORY WATER TANK HEATER PER MEL.