What was found
DURING ROUTINE C CHECK INSPECTION, FOUND MAIN CARGO COMPARTMENT RIGHT FLANGE FRAME HAS MISDRILLED HOLE AT STATION 420.000 LONGERON 17-18 RIGHT. BLENDED OUT MISDRILLED AREA. PERFORMED NDT INSPECTION. NO CRACK AND NO CORROSION FOUND. FABRICATED ANGLE DOUBLER. PERFORMED HEAT TREATMENT. CLEANED, TREATED, PRIMED AREA AND REPAIR PARTS. INSTALLED REPAIR PARTS IAW FAA FORM 8110-3 NUMBER 08549, SEMAN DRAWING ED-4877, DC8 NDT SPM PART 06-10-01-001, DC8 SRM 51-1-1 PAGES 1, 13, AND 17, DC8 SRM 51-1-8B, DC8 SRM 51-1-20D, AND SRM 51-3-1.