As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
WHILE AIRCRAFT WAS IN HEAVY CHECK, MAINTENANCE FOUND LOWER FUSELAGE EXTERIOR RIB 45 HAS CORROSION AT THE AFT END OF THE PANEL ON THE REINFORCEMENT U. REPAIRED LOWER SUPPORT RIB 45 WITH FABRICATED DOUBLER/REINFORCEMENT U, IAW ETD 2011-170-105006. MATERIAL VERIFICATION 2024T3 .071" PO 000587-2010 FOR DOUBLER/REINFORCEMENT U. THE AIRCRAFT REMAINS OUT OF SERVICE AND IS STILL IN HEAVY CHECK.