As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AFTER DEPARTURE, DISCOVERED ALL LAVATORIES INOPERATIVE. RETURNED & EMER DECLARED. LANDED OVERWEIGHT WITHOUT INCIDENT. SERVICED LAVATORIES & CLEARED CLOG IN FWD LAVATORY. NO DEFECTS NOTED ON OVERWEIGHT LANDING INSPECTION. FLIGHT REFUELED & DEPARTED.