As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
LHR - FLT 108 - EN ROUTE BOS-LHR - DURING CRUISE, FIRST CLASS GALLEY OVEN EMITTED SMOKE FROM INSIDE OVEN COMPARTMENT DURING USE. NO OTHER ABNORMAL INDICATIONS. AIRCRAFT PROCEEDED LHR AND LANDED WITHOUT INCIDENT. CLEANED INTERIOR OF FIRST CLASS GALLEY OVEN. SYSTEM GROUND CHECKED NORMAL OPERATION. (W)