As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
WHILE AIRCRAFT WAS IN HEAVY CHECK MAINTENANCE FOUND AFT RIGHT FLOORBEAM AT FRAME 85 AND 87 CORRODED. MAINTENANCE REMOVED AND REPLACED AFT RIGHT FLOORBEAM AT FRAME 85 AND 87 IAW EMB 175 SRM 51-43-01, AND 51-41-01. AIRCRAFT IS OUT OF SERVICE IN HEAVY CHECK.