What was found
YIP - PER AD 66-04-02 INSPECTION, RIGHT WING NR 4 FUEL TANK UPPER SURFACE, 1 INCH LONG SUBSURFACE RP/UT CORROSION/CRACK INDICATION IN PLANK 5 AT 4/5 PLANK JOINT, RWS 286-287. ROUTED OUT CRACKED AREA, RWS284 TO RWS286, PER SB620. FABRICATED AND INSTALLED REPAIR PER L-188 SRM 57-2-1 PAGE 33. (M)