What was found
MAJOR REPAIR DURING HEAVY CHECK WAS REPORTED THAT RIB 11 BOTTOM SIDE IS CRACKED. MAINTENANCE REMOVED CRACKED FLANGE FABRICATED AND INSTALLED REPAIR ANGLE IAW ETD 2015-170-068788, REV B. REFERENCE WC C1-C2 FOR MATERIALS, NDT, AND FINAL INSPECTION. ORIGINAL CRACK LENGTH IS .500 ISSUED DMI R181658/1 FOR 6 MONTHS TO ADD INTERNAL DET THRESHOLD 20,000, F/C AT INTERVAL OF 20,000 F/C TO MAINTENANCE PLAN IAW GMM 9.5.4 PLACED DAMAGE ON TRACKER NR 4 IAW GMM 5.16.1, FCBS 55-10-00-005.