What was found
MCN - DURING C20 CHECK DISCOVERED VERTICAL WEB CRACKED, 1.31 INCHES, FROM WL 226 TO WL 234, BS 178 AND BL 17R. MAINTENANCE REMOVED VERTICAL WEB FROM WL 226 TO WL 234, BS 178 AND BL 17R IAW BOEING 737-300 SRM 53-10-08-2R17 FIG 201. FABRICATED NEW WEB IAW BOEING 737-300 SRM 53-10-08-2R17 AND BOEING DWG 65-17582. INSTALLED FABRICATED REPAIR PARTS AT BS 178, BL 17R AND FROM WL 226 TO WL 234 IAW BOEING 737-300 SRM 53-10-08-2R17 FIG 201.