As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AIRCRAFT WAS NOT GROUNDED: DURING DEPLANING, A LAVATORY SMOKE MESSAGE DISPLAYED ON GALLEY PANEL. NO INDICATION IN COCKPIT OR SMELL FROM EITHER LAVATORIES. MAINTENANCE RESET SDCU PER TSM 24-00-00 AND PERFORMED LAVATORY E SMOKE DETECTOR TEST, NO FAULTS NOTED.