As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
PITTING CORROSION WAS FOUND IN LT WING JUST AFT OF WING DRAIN ON THE FWD FACE OF THE MAIN SPAR CAP FROM WS125 TO 128, AND ON THE RIB JUST IB OF THE WING DRAIN. PITTING CORROSION WAS ALSO FOUND IN THE RT WING IN THE SAME LOCATION ON THE FWD FACE OF THE MAIN SPAR. CORROSION WAS DRESSED OUT, BLENDED AND FAA APPROVED FACTORY DESIGNED REPAIRS WERE INSTALLED. TIME SINCE LAST INSPECTION WAS 12 MONTHS.