What was found
MCN - MAJOR REPAIR - DURING C-18 CHECK CORROSION ON THE BOTTOM SURFACE OF THE BS 312 T-CAP LWR AFT REPAIR SPLICE ANGLE AT RBL 21 WL 208. MAINTENANCE REMOVED, FABRICATED, INSTALLED, REPLACEMENT SPLICE ANGLE ON BOTTOM SURFACE OF BS312 TEE CAP AT RBL21 WL208 IAW B737-300 SRM 53-10-51-2 FIG 205.