As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
CORROSION DAMAGE TO THE WING CENTER SECTION UPPER SKIN WAS FOUND AT NUMEROUS LOCATIONS AT THE UPPER SKIN TO STRINGER ATTACH FASTENER HOLES ON STR 1 TO 8, 10 TO 12, 14 AND 15. ALSO, CORROSION WAS FOUND AROUND SEVERAL SKIN TO REAR SPAR ATTACH FASTENER HOLES. REPAIRED PER ERA 330443-14.