What was found
AIRCRAFT WAS NOT GROUNDED: OVEN NR 4 BUSINESS CLASS WAS HEATING A MEAL, WHEN DOOR WAS OPENED SMOKE WAS DISCOVERED. DOOR WAS SHUT, POINTER TURNED OFF, SOME ELECTRICAL SMELL WAS DETECTED. MAINTENANCE REPLACED NR 4 OVEN BUSINESS CLASS GALLEY PER AMM 25-35-19 AND PERFORMED SATISFACTORY OPERATIONAL CHECK.