As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING C4 S1 C-CHECK, INSPECTION REPORTED CORROSION WAS FOUND AT FRAME SUPPORT OF FLOORBEAM Y1732 AFT OF FRAME 69. MAINTENANCE REMOVED AND REPLACED FRAME SUPPORT IN ACCORDANCE WITH SRM 51-42-11 PARAGRAPH 6, 7 AND 14 AND EA A9-53R-30196. UPON COMPLETION OF THE INSTALLATION THE FRAME SUPPORT WAS INSPECTED AND FOUND ACCEPTABLE.