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 AFT CARGO DOOR AFT DRIVE ROD SHAFT CORRODED. MAINTENANCE REMOVED AND REPLACED THE AFT CARGO DOOR AFT DRIVE ROD SHAFT IAW EMB 175 AMM 52-32-24. THE AIRCRAFT IS OUT OF SERVICE IN HEAVY CHECK.