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 THE FORWARD CARGO DOOR SILL NUT PLATE SUPPORT CORRODED. MAINTENANCE REMOVED AND REPLACED THE NUT PLATE SUPPORT IAW EMB 170 SRM 51-40-02, AND 51-41-01. THE AIRCRAFT IS OUT OF SERVICE IN HEAVY CHECK.