As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ON FLIGHT 3456 ON CLIMB-OUT, CREW REPORTED LAV SMOKE WARNING. CREW RETURNED TO FIELD. AIRCRAFT REMOVED FROM SERVICE. REMOVED LAV SMOKE DETECTOR IAW AMM 26-14-01. OPERATIONAL CHECK GOOD IAW EMB AMM 26-14-00. NO FURTHER DEFECT NOTED. PERFORMED BOROSCOPE INSPECTION OF LEFT AND RIGHT ENGINES INLET AREA NO.0 CARBON SEAL AND FOUND NO EVIDENCE OF ANY LEAKS AS PER RRMM 72-00-00. PERFORMED ETN NR EM-72-034 R4. NO DEFECT NOTED. AIRCRAFT RETURNED TO SERVICE.