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 FOR HEAVY CHECK FOUND GUSSET AT FLOORBEAM 90 AND LT SEAT TRACK EXTENSION IS CORRODED. MX REMOVED AND REPLACED GUSSET AT FLOORBEAM 90 AND LT SEAT TRACK EXTENSION IAW EMB 175 SRM 51-40-02, 51-41-02. P/N 170-60257-001. A/C REMAINS IN CMH FOR HEAVY CHECK COMPLETION.