As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FOUND WASTE DRAIN VALVE ASSEMBLY INSTALLATION HOLE SURROUND CORROSION. WASTE DRAIN VALVE ASSEMBLY INSTALLATION CORROSION WASTE WATER SERVICE PANEL REMOVED AND REPLACED AS PER B777 SRM 51-40-02 REV 40.0 . REPAIR CLASSIFIED AS MAJOR PER GMM 6-2-100.