What was found
YIP - PER AD 66-04-02 INSPECTION, LEFT WING NR 2 FUEL TANK LOWER SURFACE, 5 INCH LONG SUBSURFACE RP/UT CORROSION/CRACK INDICATION IN PLANK 4 AT 3/4 PLANK JOINT, LWS 78-83. ROUTED OUT CRACKED AREA, LRWS 77.5 TO LWS 83.5, PER SB620. FABRICATED AND INSTALLED REPAIR PER L-188 SRM 57-2-1 FIG 3, SHEET 25. (M)