As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
LOWER SPAR CAP ON STUB SPAR FROM STA 33 OUTBOARD SUFFERING FROM INTERGRANULAR CORROSION SO SEVERE THAT IT REQUIRED REPLACEMENT. CORROSION FOUND WHILE REPLACING DAMAGED OUTBOARD WING ASSEMBLY, AND WAS NOT DETECTABLE FROM INSPECTIONS PERFORMED DURING ANNUAL INSPECTIONS.