What was found
MCN - MAJOR REPAIR - DURING C-17 CHECK A 1.5 INCH CRACK WAS FOUND ON LT AFT OUTBOARD SHEAR WEB, ADJACENT TO WATER LINE FITTING BETWEEN BS 996 AND BS 1005, LBL 39 AND LBL 42, WL 208. MAINTENANCE REMOVED DAMAGED AREA OF LT AFT OUTBOARD SHEAR WEB FROM BS 996 TO BS 1005, LBL 39 TO LBL 42; FABRICATED A NEW REPLACEMENT SECTION OF WEB PER DWG 65-46812-82; INSTALLED REPAIR PART IAW B737-300 SRM 51-40-02 FIG 3, 4, 6, 7, 8 & 12.