As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING FLT, FLT ATTENDANT TURNED ON HOT PLATE ON TOP LEFT MACHINE AND GOT SPARK AND SMOKE FROM BOTTOM MACHINE. CIRCUIT BREAKERS WERE NEVER PULLED BY MX IN MDW THIS ALLOWING F/A'S TO TURN ON COFFEE POTS IN THE FIRST PLACE. COMPLIED WITH REST OF MEL PROCEDURES DRYED RESIDUAL WATER NO LEAKS AT THIS TIME MDDR 196821.