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 CORROSION ON AFT GALLEY FWD HALF MATING SURFACE. MAINTENANCE INSTALLED NEW TRIM ON AFT GALLEY FWD HALF MATING SURFACE IAW EMB 170 AMM 25-00-23. AIRCRAFT IS OUT OF SERVICE IN HEAVY CHECK. P/N REMOVED AND REPLACED ARE 170-88787-001 TRIM, 170-59514-001 TRIM SPLIT JOINT, 170-88789-001 SPLIT TRIM JOINT AND CDS(2200-11 SPLIT JOINT BRACKET.