As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING HEAVY MAINTENANCE, CORROSION WAS DISCOVERED ON MAIN CABIN AT FR68 FLOORBEAM Y-1292 (RT) ON UPPER SURFACE. REMOVED AND REPLACED MAIN CABIN AT FR68 FLOORBEAM Y-1292 (RT) PN D5347218920400 PO 1036857.5 IAW SRM 51-72-11 AND 51-42-11 PER 2.F AND 2.D.