What was found
MCN - MAJOR REPAIR - DURING C-04 CHECK EXFOLIATION CORROSION WAS FOUND ON BEAM Y765 RT INBOARD SEAT TRACK BETWEEN FR 47 AND FR 64. MAINTENANCE REMOVED CORROSION AND FOUND ONLY THE AREA OF BEAM Y765 RT INBOARD SEAT TRACK BETWEEN FR 55 AND FR 64 WAS OUT OF LIMITS. CUT OUT DAMAGED SECTION OF SEAT TRACK ON BEAM Y765 FROM FR 55 TO FR 64; FABRICATED A NEW REPLACEMENT SECTION OF SEAT TRACK, A DOUBLER, AND 2 EACH REPAIR ANGLES; INSTALLED REPAIR PARTS IAW A320 53-00-15 FIG 202 PG 207-211.