As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
CLE - FLT NR 2139 - AFTER TAKEOFF, THE CREW GOT THE LAVATORY SMOKE INDICATION ON THE EICAS WITH A NOTICABLE SMOKE SMELL. RETURNED TO CLE AND LANDED WITHOUT INCIDENT. MAINTENANCE INSPECTED AIRCRAFT AND FOUND DE-ICING FLUID IN THE BLEED SYSTEM. CLEARED DE-ICING FLUID FROM BLEED SYSTEM. ALL OPERATIONAL CHECKS WERE GOOD. AIRCRAFT RETURNED TO SERVICE.