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 NUT PLATES OF THE FORWARD CARGO DOOR BUMP PLATE. MAINTENANCE REMOVED AND REPLACED THE NUT HOLDERS (PLATES) AT THE FORWARD CARGO DOOR CUT-OUT BUMP PLATES IAW EMB 175 SRM 51-41-02. REFERENCE PART NUMBERS 170-91833-401, 170-91834-401, 170-91835-401 & 170-91835-402 (NUT HOLDERS). AIRCRAFT IS CURRENTLY STILL OUT OF SERVICE FOR HEAVY CHECK COMPLETION.