What was found
CORROSION RT & LT HORIZONTAL REAR SPAR, LOWER CHORD. DURING INSPECTION CORROSION WAS FOUND ON THE RT & LT HORIZONTAL REAR SPAR, LOWER CHORD. THE SURFACE CORROSION WAS CLEANED AWAY & BLENDING WAS PERFORMED AT THE LOCAL DAMAGED AREA. NDT WAS THEN PERFORMED TO RECORD MATERIAL LOSS & DETERMINE THAT THE PART WAS FREE OF DEFECTS. A .032 THICK 7075-T6 DOUBLER WILL BE SANDWICHED BETWEEN THE EXISTING COMPOSITE AERODYNAMIC FILLER & THE REAR SPAR LOWER CHORD. IAW EO ATR-55-07-2014.