As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
LAV SMOKE DETECTOR FAIL MESSAGE ON EICAS. REMOVED AND REPLACED LAV SMOKE DETECTOR IAW AMM 26-14-01 & TASK CARD 6271001. OPS CHECK GOOD. AIRCRAFT WAS APPROVED FOR RETURN TO SERVICE. OPS CHECK GOOD. AIRCRAFT WAS APPROVED FOR RETURN TO SERVICE.