What was found
SAL - DURING C4 CHECK DISCOVERED CORROSION ON WEB AT FS 20, Y-1584. REWORK WAS FOUND TO BE OUT OF LIMITS IAW AIRBUS 320 51-40-04. MAINTENANCE REMOVED WEB FROM FS 20 TO FS 24, Y-1584 TO Y-1784 IAW AIRBUS 320 SRM 51-72-11. NEW WEB INSTALLED FROM FS 20 TO FS 24, Y-1584 TO Y-1784 IAW AIRBUS 320 SRM 51-72-11.