As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
GENERATED WHILE A/C WAS IN HEAVY CHECK, GUSSET AT FWD WASTE TANK SUPPORT FRAME 90 HAS CORROSION. MAINTENANCE REMOVED AND REPLACED GUSSET AT FWD WASTE TANK SUPPORT FRAME 90 IAW EMB SRM 51-41-02. A/C IS STILL CURRENTLY OUT OF SERVICE FOR HEAVY CHECK.