As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
WHILE AIRCRAFT WAS IN FOR HEAVY CHECK MAINTENANCE FOUND CORROSION ON GUSSET BETWEEN FRAME 11 AND FRAME 12. MAINTENANCE REMOVED AND REPLACED GUSSET OF FLOORBEAM CENTER AT FRAME 11 AND AFT INTERCOSTAL WITH NEW MANUFACTURED GUSSET IAW EMB 170 SRM 51-31-00 AND 51-41-02. GUSSET FABRICATION 2024 T3 .040" PO 024093-2011. THE AIRCRAFT IS OUT OF SERVICE IN HEAVY CHECK.