What was found
FLT 177, BOS LAS. DURING CRUISE FLIGHT, CABIN CREW ADVISED SMOKE IN THE FWD GALLEY COMMING FROM OVEN. THEY SHUTT OFF OVEN AND SMOKE DISAPPATED, PER MCC PULLED BOTH CB FOR OVEN 103 AND 104 WERE PULLED AS A PRECAUTION. FLIGHT ATTENDANT BELIEVED SMOKE TO BE ELECTRICAL IN NATURE; R & R LH OVEN IAW AMM 25-30-00. OPS CHECK GOOD. THIS ACTION CLEARS MDDR # 438339. MX-4 UPDATED, PLACARD REMOVED, MCC NOTIFIED.