As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
WHILE A/C WAS IN HEAVY CHECK MAINTENANCE DISCOVERED LEVEL TWO CORROSION ON RT CENTER FLOORBEAM BETWEEN FRAMES 87-88. MAINTENANCE REMOVED CORROSION IAW EMB 170 SRM 51-12-01. MAINTENANCE FOUND BEAM TO BE OUT OF LIMITS, DRILLED NEW FLOORBEAM IAW EMB 170 SRM 51-40-02, INSTALLED BEAM IAW EMB 170 SRM 51-43-01 AND 51-41-01.