As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
LAVS INOP, FLIGHT DIVERTED. APPEARS FWD TANKS (LT AND RT) ARE SHUTDOWN. NO AHM DATA SHOWING ANY FAILURES. SENSOR "INOP" LIGHTS ARE ILLUMINATED ON ACCESS PANEL (R2 DOOR) FOR LAV BOTH FWD LAV TANKS. LAVATORY TANKS SERVICED PROPERLY AND ALL LIGHTS WENT OUT WITH ALL LAVS WORKING. WORK ACCOMPLISHED PER MM. OK FOR SERVICE.