What was found
OVEN 411 AFT GALLEY OVEN STARTED BELLOWING HEAVY SMOKE. THE SMOKE APPEARED TO BE COMING FROM THE METAL VENT ON TOP OF THE OVEN NOT FROM INSIDE C/B POPPED AND NOT RESET. DUE NIL SPARE FWD TO PLA C/N 541504 C/B PULLED AND COLLARD. REMOVED AND REPLACED OVEN AND OVEN TEMP. CONTROLLER AT POS # 411. OPS CHECKED NORMAL, OK FOR SERVICE. PLACARD REMOVED. ROTABLE PARTS CHANGE WAS INDICATED - TT # 1433695 S/N OFF 00172 OVEN, LARGE, SG OFF 99-2533-9-0002 0172 ON 99-2533-9-0002 0370.