What was found
MCN - MAJOR REPAIR - DURING C-17 CHECK EXFOLIATION CORROSION WAS FOUND ON UPPER AND LOWER SURFACE OF LT AFT OUTBOARD SHEAR WEB BS 986-1016, LBL 38-46, WL 208. MAINTENANCE REMOVED CORROSION AND FOUND MATERIAL LOSS TO BE OUT OF LIMITS; REMOVED LT AFT OUTBOARD SHEAR WEB BS 986-1016, LBL 38-46, WL 208; FABRICATED A NEW REPLACEMENT SHEAR WEB; INSTALLED REPAIR PART IAW B737-300 SRM 51-40-02, PG 38 & 55, FIG 8.