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 *** LEVEL TWO CORROSION WAS FOUND IN THE AFT GALLEY/LAV AREA, CTR LT FLOORBEAM TIE PLATE AT FR 90. MAINTENANCE REMOVED AND REPLACED LT SHEAR PLATE AT FR 90 IAW EMB 175 SRM 51-41-02. AIRCRAFT IS CURRENTLY STILL OUT OF SERVICE FOR HEAVY CHECK COMPLETION.