As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
MCN - MAJOR REPAIR - DURING C-04 CHECK FILIFORM CORROSION WAS FOUND ON UPPER SURFACE OF FLOOR RAIL Y81 RIGHT AT FR 16. MAINTENANCE REMOVED DAMAGED FLOOR RAIL Y81 RIGHT AT FR 16; FABRICATED A NEW REPLACEMENT RAIL; INSTALLED REPAIR PART IAW A320 51-42-11 PG 6-7.