As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
SMOKE FWD LAVATORY WENT OFF AT FL 370. SUSPECT FROM OVEN. NO SIGN OF SMOKE. REMOVED ALL OLD PAPER & DEBRIS FROM BEHIND THE OVEN. DUPLICATED FAULT WITH OVEN IN HIGH & WARMED UP, OPENED DOOR & RECEIVED MSG. REPLACED THE OVEN ASSEMBLY & ALL THE COOKING SHELVES IAW AMM 25-32-01. ALL CHECKED NORMAL, DURING OVEN OPERATION RECEIVED NO CAUTIONS FOR SMOKE.