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 REPORTED LEVEL 2 CORROSION ON THE CENTER FUSELAGE III FLOOR SUPPORT STRUCTURE SHEAR PANEL AT FR87, MID PANEL. MAINTENANCE REMOVED AND REPLACED THE CENTER FUSELAGE III FLOOR SUPPORT STRUCTURE SHEAR PANEL AT FR87, MID PANEL IAW EMB SRM 51-42-01. AIRCRAFT IS CURRENTLY STILL OUT OF SERVICE FOR HEAVY CHECK COMPLETION.