As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FLIGHT 3066 - RIC - FLIGHT CREW REPORTED "LAV SMOKE" WARNING INDICATION IN EICAS AND STRANGE SMELL ON CLIMB. CREW PERFORMED AIR RETURN AND LANDED ACFT UNEVENTFULLY. RIC MX R&R LAVATORY SMOKE DETECTOR PANEL AND PERFORMED OPS CHECK SUCCESSFULLY. ACFT WAS APPROVED FOR RETURN TO SERVICE.