What was found
MCN - DURING C19 CHECK DISCOVERED 188 FRAME CRACKED, 2.1 INCHES, IN RADIUS AT WL 208 AND BL 31L. MAINTENANCE CUT OUT AND REMOVED DAMAGED PORTION OF CHORD WEB AT BS 188 FRAME IAW BOEING 737-300 SRM 53-00-07-2R11. PERFORMED HFEC INSPECTION, NO CRACKS NOTED. FABRICATED REPAIR ANGLE, TAPERED FILLER AND FILLERS IAW BOEING 737-300 SRM 53-00-07-2R11. INSTALLED FABRICATED REPAIR PARTS AT BS 188 FRAME, WL 208 AND BL 31L IAW BOEING 737-300 SRM 53-00-07-2R11.