As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING CRUISE -RT FWD - MID AFT AND AFT LT LAV INOP, FOUND SYS 2 WASTE LVL IND SHOWS FULL ON AFT PNL SERVICED AND FLUSHED BOTH LAV SYS. ALL LAVS OPS NORMAL. R & R SYS 2TANK LOGIC CONTROL MODULE IAW AMM AS PRECAUTION. SVC ALL LAVS WITH VINEAR. ETOPS CATEGORY 'B': DIVERSION OR TURNBACK.