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 GALVANIC CORROSION WAS FOUND ON UPPER SURFACE OF RAIL Y-503, BETWEEN FR 14 AND FR 16. MAINTENANCE REMOVED CORROSION AND FOUND MATERIAL LOSS TO BE OUT OF LIMITS. REMOVED CORRODED RAIL Y-503, BETWEEN FR 14 AND FR 16. FABRICATED A NEW REPLACEMENT RAIL. INSTALLED REPAIR PART IAW A320 SRM 51-42-11 PG 35.