As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FLIGHT 1281, PILOT REPORTED THAT A LAV SMOKE INDICATION ILLUMINATED DURING CLIMB OUT. A VISUAL INSPECTION WAS PERFORMED AND SMOKE, FIRE AND/OR UNUSUAL ODORS WERE NOT NOTICED. THE AIRCRAFT LANDED WITHOUT INCIDENT. THE LAV SMOKE WARNING SYSTEM OPERATIONALLY TESTED GOOD. DURING TROUBLESHOOTING RELAY K8100 FOR THE LAVATORY LIGHT ASSEMBLY WAS FOUND TO BE SHORTED. THE RELAY WAS REPLACED AND THE DISCREPANCY CLEARED.