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 MAINTNENACE FOUND THE LAV SERVICE DOOR HINGE HAS CORROSION. MAINTENANCE FOUND NO EVIDENCE OF CORROSION ON HINGE, REPLACED HARDWARE IAW EMB 175 AMM 20-10-01. THE AIRCRAFT IS OUT OF SERVICE IN HEAVY CHECK.