As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING HEAVY MAINTENANCE CHECK CENTER SECTION UPPER PANEL CORRODED AT RT APPROX. STA. 1219, XCW 16.0 S-16. AFTER FURTHER EVALUATION BOEING CERTIFIED THE BLENDED OUT AREA AS A PERMANENT REPAIR AND BEEN COMPLETED WITH ALL THE REQUESTED PROVISIONS AT CENTER WING UPPER PANEL RH APPROX. STA 1219, XCW 16.0S-16 IAW MESSAGE WGN-25-0035-04C. THE AIRCRAFT WAS APPROVED FOR RETURN TO SERVICE.