As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
MAINTENANCE REPORTED LEVEL 2 CORROSION AT THE FORWARD LAVATORY, OUTBOARD-AFT FLOOR MOUNT BLOCK AND INSIDE CENTER SPLIT BLOCK COUPLER. MAINTENANCE REMOVED AND REPLACED THE FORWARD LAV, OUTBOARD-AFT FLOOR MOUNT BLOCK AND INSIDE CENTER SPLIT BLOCK COUPLER IAW EMBRAER 170/175 AMM 20-10-01. AIRCRAFT IS CURRENTLY STILL OUT OF SERVICE FOR HEAVY CHECK COMPLETION.