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