What was found
DURING BRIDGE CHECK, (REF AIRBORNE N/R 10049-0231) UPON OK TO INSTALL FOUND EVIDENCE OF CORROSION ON INBOARD SEAT TRACK IN MAIN CABIN FR 44-47 LBL 29.5, PER AIRBORNE N/R 10049-0231. SEAT TRACK ASSEMBLY FLOOR BEAM REPLACED, IAW ARM-A320-51-72-11-911-001.