What was found
MCN - MAJOR REPAIR - DURING C-20 CHECK A .5 INCH CRACK WAS FOUND ON SHEAR TIE IN AFT CARGO COMPARTMENT BS 807, BL -0-. MAINTENANCE REMOVED DAMAGED SHEAR TIE IN AFT CARGO COMPARTMENT BS 807, BL -0-; FABRICATED A NEW REPLACEMENT SHEAR TIE; INSTALLED REPAIR PART IAW B737-300 SRM 53-00-07 FIG 203, PG 207-209.