As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING HEAVY MAINTENANCE: UNDER MAIN CABIN FLOORBOARD, FLOORBOARD LONGITUDE SUPPORT AT FR 16 TO FRAME 21-1292 STA 7599 HAS CORROSION; "REF HAECO-GSO SO 169002 NR 44295. REMOVED AND REPLACED SEAT TRACK IAW A320 SRM 51-42-11 AND AIRBUS DRAWING D53112782.THIS REPAIR IS A CATEGORY A. NO FURTHER ACTION REQUIRED. WORK ACCOMPLISHED BY 4039784 QC503. (CONSIDERED A MAJOR REPAIR)