As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
LAVATORIES 100 AND 101, SMOKE ALARMS SOUNDED MULTIPLE TIMES DURING FLIGHT. LAVATORIES ARE IN CLOSE PROXIMITY TO THE FIRST CLASS GALLEY, SUSPECT SMOKE WAS EMITTED FROM ONE OF THE OVENS. BOTH LAVATORY SMOKE DETECTORS WERE SOUNDING. PERFORMED THE SMOKE DETECTOR TEST IAW AMM TASK 26-13-00-730-801, CHECKED OK.