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 CORROSION ON THE FORWARD LEFT INBOARD FUSELAGE SEAT TRACK EXTENSION. MAINTENANCE REMOVED AND REPLACED THE FORWARD LEFT INBOARD SEAT TRACK EXTENSION IAW EMB 175 SRM 51-43-01, 51-41-01. THE AIRCRAFT IS OUT OF SERVICE IN HEAVY CHECK.