As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
MCN - DURING C4 CHECK DISCOVERED CORROSION ON Y254 BEAM, AT FS 16 AND FS 20+4". CORROSION WAS FOUND TO BE OUT OF LIMITS IAW AIRBUS 320 SRM 53-11-14 FIG 104. MAINTENANCE REMOVED AND INSTALLED NEW FLOORBEAM AT Y254 FROM FS 12 TO FS 24 IAW AIRBUS 320 SRM 51-47-11.