As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
WHILE AIRCRAFT WAS IN FOR HEAVY CHECK, LEVEL 2 CORROSION WAS FOUND ON THE FORWARD CARGO DOOR, ON THE INSIDE SURFACE OF THE LOWER FORWARD SEAL DEPRESSOR FITTING. MAINTENANCE REMOVED & REPLACED THE FORWARD CARGO DOOR SEAL REST IAW EMB 175 AMM 20-10-01 AND EMB 175 SRM 51-40-02. AIRCRAFT IS STILL CURRENTLY OUT OF SERVICE FOR HEAVY CHECK COMPLETION.