As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING HEAVY MAINTENANCE RH OUTER WING LOWER REAR SPAR HAS CORROSION @ APPROX (XORS-799). AFTER FURTHER EVALUATION BOEING CERTIFIED THE BLENDED LOCATION AS A PERMANENT REPAIR AND BEEN ACCOMPLISHED WITH ALL THE REQUESTED PROVISIONS AT RH OUTER WING LOWER REAR SPAR AT APPROX. XORS-799. THE AIRCRAFT WAS APPROVED FOR RETURN TO SERVICE.