What was found
MCN - MAJOR REPAIR - DURING C-16 CHECK CORROSION WAS FOUND ON WEB IN AFT CARGO COMPARTMENT AT BS 845, RBL 22, WL 155. MAINTENANCE REMOVED CORROSION ON WEB IN AFT CARGO COMPARTMENT AT BS 845, RBL 22, AND FOUND MATERIAL LOSS OUT OF LIMITS. REMOVED DAMAGED WEB, FABRICATED A NEW -3 WEB, AND INSTALLED REPAIR IAW B737-300 SRM 51-40-02, PG. 5, AND SRM 51-20-05, PG. 3-4.