What was found
INNER CHORD OF AFT LOWER CARGO DOOR LOWER SILL CORRODED. THE DAMAGE WAS ISOLATED TO THE LOWER HORIZONTAL FLANGE OF THE CHORD SPANNING FROM STATION 1340 - 1440 AT S27R. CORROSION WAS REMOVED IAW SRM 53-60-15, FIG 101, EXCEEDING PUBLISHED LIMITS. A HFEC OPEN HOLE AND SURFACE SCAN INSPECTION WAS ACCOMPLISHED IAW NDT MANUAL PART 6 REVEALING A DAMAGE FREE CONDITION. FABRICATED A TAPERED FILLER FROM 7075-T6 ALUMINUM TO FIT THE BLENDED AREA AND INSTALLED IAW AMES DOCUMENT 47050REA04.