As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
EMERGENCY DECLARED. FLIGHT DIVERTED DUE TO 4 OF 6 LAVATORIES READING FULL. LANDING UNEVENTFUL. ACCOMPLISHED LAVATORY LEVEL SENSOR AND CONTROLLER RESET IAW AMM 38-33-00. ISSUE REPEATED ON LAVATORIES FS3, M2, AND A5 FIVE HOURS INTO CONTINUED FLIGHT. REMOVED FORWARD WASTE TANK BLOCKAGE. OPERATIONAL CHECK IAW AMM 38-32-00 GOOD. AIRCRAFT WAS GROUNDED.