What was found
REPAIRED CORROSION ON THE LEFT WING REAR SPAR UPPER EXTRUSION VERTICAL FLANGE BETWEEN RIBS 24-27 AS FOLLOWS. BLENDED OUT CORROSION IN ACCORDANCE WITH ATR STRUCTURAL REPAIR INSTRUCTIONS DO/TS-107/09-11167 ISSUE A. THE DEVIATIONS WERE THAT HOLES WERE OVERSIZED TO THE 2ND OVERSIZE. EDDY CURRENT OF THE BLENDED AREAS AND ROTO TEST OF THE FASTENER HOLES. NO CRACK INDICATIONS WERE FOUND. APPROVED DATA FOR THIS REPAIR IS ATR STRUCTURAL REPAIR APPROVAL SHEET (SRAS) DO/TS-107/09.