As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FLIGHT 5461 - DURING CLIMBOUT OF CVG RECEIVED A FWD AND AFT LAVATORY SMOKE WARNING MESSAGE, CREW DECLARED AN EMERGENCY AND RETURNED TO THE FIELD. FLIGHT LANDED WITHOUT INCIDENT. PERFORMED OPERATIONAL CHECKS OF BOTH AIR CONDITIONING PACKS ON APU BLEED AIR, SMELL OF SMOKE DISAPPEARED. SUSPECT GLYCOL IN AIR DISTRIBUTION SYSTEM.