What was found
FTW - FOUND AFT ACC AREA FRAME T-CAP AT AFT SHROUD OF APU HAS CORROSION AT STATION 1401, 27L-27R. INTERCOSTAL AT FS 1380 TO 1401 LBL 13 IS FOUND TO BE OUT OF LIMITS. FABRICATED NEW INTERCOSTAL. FRAME AT 1394 IS CRACKED. FABRICATED NEW FRAME. REMOVED LOWER T-CAP. LOCATED AND DRILLED NEW LOWER T-CAP. FOUND CRACK ON RT LEG OF VERTICAL BEAM. REMOVED VERTICAL BEAM. LOCATED AND DRILLED NEW RT VERTICAL BEAM. INSTALLED T-CAP. INSTALLED VERTICAL BEAM. INSTALLED RT INTERCOSTAL.