As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING HEAVY MAINTENACE AT PREMIER AVIATION IN QUEBEC CANADA CORROSION WAS DISCOVERED ON THE LH WING LOWER SKIN AT FUEL PUMP CUT-OUT BETWEEN RIBS 4-5. CORRECTIVE ACTION: CORRODED SKIN AREAS BLENDED OUT AND INSPECTED FOLLOWING ATR INSTRUCTIONS REF. ES_00214702_01 ISSUE A.