What was found
DURING C-18 CHECK, FOUND A 3/8 INCH CRACK IN SHEAR TIE AT BS 348, BETWEEN STR 20 RT AND STR 21 RT. MAINTENANCE REMOVED CRACKED SHEAR TIE AT BS 348, STR 20 - 21 RT; FABRICATED A NEW REPLACEMENT SHEAR TIE PER DWG 65-45812; INSTALLED REPAIR PART IAW B737-300 SRM 51-40-02, FIG 3, 4, & 8.