As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
MCI - FLIGHT 2598, THE CREW REPORTED A LAV SMOKE EICAS MASTER WARNING IN FLIGHT. THE AIRCRAFT LANDED AT IAH WITHOUT INCIDENT AND MAINTENANCE REMOVED AND REPLACED THE SMOKE DETECTOR PANEL, OPERATIONALLY TESTED WITH NO DEFECTS, AND THE AIRCRAFT WAS APPROVED OFR RETURN TO SERVICE.