What was found
MCN - MAJOR REPAIR - DURING C-12 CHECK A CRACK WAS FOUND ON THE AFT END OF STR 18 R/H, BS 727. MAINTENANCE TRIMMED OUT CRACK IN STR 18 SHEAR WEB, PERFORMED HFEC INSPECTION TO VERIFY CRACK WAS CONTAINED, FABRICATED SHEAR WEB FILLER, -12 GUSSET, -194 RADIUS FILLER, AND INSTALLED REPAIR PARTS IAW AWA ER 03-5312-02109-GF1.