What was found
D-CHECK, DAMAGE WAS FOUND ON RT SIDE OF NR 1 PYLON STRUCTURE ASSY. CRACK DAMAGE WAS AT PRECOOLER EXHAUST CUTOUT LOWER AFT CORNER AT NAC STA 248. INNER SKIN DOUBLER WAS TRIMMED AT GRILL ATTACHED HOLE TO REMOVE CRACK DAMAGE. INNER SKIN DOUBLER TRIMMED EDGE, EXPOSED WINDOW STRAP SURFACE, ALONG WITH THE FASTENER HOLES, WERE HFEC INSPECTED TO ENSURE ABSENCE OF ANY CRACK OR OTHER DAMAGE. NR 3 STIFFENER WAS REINFORCED WITH A NEW STEEL LOWER REPAIR ANGLE FROM NAC STA .235 TO .254. RIB INSTALLATION AT NAC STA 248 WAS MODIFIED TO ACCOMMODATE NEW STEEL REPAIR ANGLES INSTALLATION ON THE NR 3 STIFFENER. AN ALUMINUM FILLER, FOR TRIMMED AREA OF INNER SKIN DOUBLER, WAS INSTALLED USING EXISTING NUT PLATE RIVETS.