As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
TYS - A/C IS CURRENTLY IN A C-CHECK STATUS WHEN THE INSPECTION DEPARTMENT FOUND CORROSION UNDER THE LOWER AFT SERVICE DOOR TEFLON GUIDE. MAINTENANCE REPAIRED THE CORROSION UNDER THE TEFLON GUIDE AT THE SERVICE DOOR IAW EC5310-01532, REFER TO M6023 (0554421 2-339) FOR THE DMI. WORK ACCOMPLISHED AND WILL BE RELEASED AT THE END OF THE CHECK.