What was found
C4 PDX - LEFT WING FORWARD SPAR AT INBOARD LEADING EDGE HAS FRETTING CORROSION AT UPPER INBOARD SCREW HOLE AT STATION YW48.00. REPAIRED IAW RD8-57-1150, RD8-57-811, SRM 51-20-26, AND 51-20-36.
As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
C4 PDX - LEFT WING FORWARD SPAR AT INBOARD LEADING EDGE HAS FRETTING CORROSION AT UPPER INBOARD SCREW HOLE AT STATION YW48.00. REPAIRED IAW RD8-57-1150, RD8-57-811, SRM 51-20-26, AND 51-20-36.