As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ACFT CURRENTLY IN A C-CHECK STATUS WHEN INSPECTION FOUND THE SKIN PANEL AT FRAMES 13 AND 14 AND STRINGERS 20L AND 21R CORRODED. MAINTENANCE REMOVED AND REPLACED THE SKIN PANEL, AREA FOUND TO BE GOOD IAW WITH TASKCARD 34-13-04-280 AND EC 5330-02344. ACFT RELEASED AT END OF CHECK.