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 *** LEVEL 2 CORROSION WAS FOUND ON THE RT FLOOR SUPPORT GUSSET AT FR 89. MAINTENANCE REMOVED AND REPLACED THE RT SEAT TRACK SPLICE AT FRAME 89 IAW EMB 175 SRM 51-43-01 & 51-40-02. AIRCRAFT IS CURRENTLY STILL OUT OF SERVICE FOR HEAVY CHECK.