What was found
RT LOWER WING PLANK FUEL ACCESS HOLE 640DB HAS MULTIPLE INDICATIONS NOTED IN AFT LANDING CRITICAL AREA APPROX .5 INCH IN LENGTH 50 PERCENT FSH AND O/B LANDING NON-CRITICAL AREA APPROX .2 INCH IN LENGTH 50 PERCENT FSH FAILED NDT INSP AREAS MARKED ON ACFT. REPAIRED RT WING PLANK AT ACCESS HOLE 640DB IAW REO 601R-57-21-030, STEPS 1-12. COMPLIED WITH EC/TC EO 600-57-81 C/W IAW REO 601R-57-21-030 REV G.