As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
WHILE AC WAS OUT OF SERVICE FOR HEAVY CHECK, LEVEL 2 CORROSION WAS FOUND IN THE AFT WET AREA, CENTER SHEAR PANEL IN MULTIPLE AREAS. MAINTENANCE REMOVED AND REPLACED THE SHEAR PANEL IAW SRM 51-42-01. AC REMAINS OUT OF SERVICE FOR HEAVY CHECK COMPLETION.