As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AFT GALLEY OVEN NR 3 HAD SPARKS ON TOP WHEN TURNED ON, PULLED C/B. PULLED OVEN AND INSPECTED OVEN AND AREA FOR EVIDENCE OF ELECTRICAL OR MECHANICAL DEFECT. NO TROUBLE FOUND. REACTIVATED OVER AND PERFORMED OP CK, NO DEFECT NOTED. AS PRECAUTION REPLACED OVEN, S/N670.