As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
LCQ - MAJOR REPAIR - DURING C-09 CHECK EXFOLIATION CORROSION WAS FOUND ON CABIN FLOORBEAM AT BS 1680 FROM LBL 54 TO RBL 54. MAINTENANCE REMOVED CORRODED FLOORBEAM UPPER CHORD AT BS 1681 FROM LBL 54 TO RBL 54; FABRICATED A NEW REPLACEMENT UPPER CHORD; INSTALLED REPAIR PART IAW ER 19-5365-00046-JS2A.