As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
SHIP 665 AWR. SECONDARY NRC IN REF NRC.00370, HIDDEN CORROSION WAS FOUND AFTER FIBERGLASS SKIN REMOVAL ON L/E OF INBD MAIN FLAP AT RH WING. CORRECTIVE ACTION: SUMMARY OF NRC 00629. SKIN ON L/E OF INBD MAIN FLAP AT RH WING WAS REPAIRED PER B757-200 SRM. (2711416)