As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AFTER REMOVAL OF THE LT WING DEICE BOOT, CORROSION ON THE IB WING SKIN WAS FOUND. THE DAMAGE WAS MEASURED AND FOUND TO EXCEED THE MANUFACTURERS LIMITS REQUIRING WING SKIN REPLACEMENT. THE DAMAGE WAS LIMITED TO CORROSION PITTING, NONE HAD PENETRATED THOUGH THE SKIN.