As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING C-CHECK INSPECTION, FLOORBEAM UPPER CHORD AND DECK PLATE WERE FOUND CORRODED AT BS 1681. THE DECK PLATE WAS REMOVED AND ADDITIONAL CORROSION WAS FOUND ON THE FLOORBEAM. THE DECK PLATE IS ORIGINALLY 0.071 INCH THICK 2024-T3 CLAD ALUMINUM. THE FLOORBEAM IS MADE FROM BAC1518-827 7075T6511 ALUMINUM EXTENSION. REPAIRED PER IAW EA 55-120079.