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 LOWER AFT SEAL REST CORRODED. MAINTENANCE REMOVED AND REPLACED THE SEAL REST IAW EMB 170 SRM 51-40-02. "MAJOR REPAIR" THE AIRCRAFT IS OUT OF SERVICE IN HEAVY CHECK.