As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING HEAVY CHECK, RT WING AFT RIB 10 HOLE IN INBD LOWER FLANGE JUST FWD OF SPAR 2 IS CRACKED CRACKS RADIATING INBD AND OTBD FROM HOLE. MAINTENANCE REPAIRED HOLE IAW ETD 2015-170-028597 FINAL HOLE REAMED TO 504 INSTALLED BUSHING. C1-C2 FOR WORK DETAILS. ACFT REMAINS UNTIL HEAVY CHECK IS COMPLETED..