As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FLT 4114 - SMOKE TOILET CAUTION MESSAGE APPEARED. INSPECTED RIGHT ENGINE, AIR CYCLE MACHINE AND ASSOCIATED DUCTING FOR SIGNS OF CONTAMINATION WITH NO DISCREPANCIES NOTED. RAN ENGINES AT FULL POWER FOR 30 MINUTES AND COULD NOT DUPLICATE. OPS CHECK OF LAV SMOKE DETECTOR GOOD.