What was found
DURING C4 CHECK, DISCOVERED GALVANIC CORROSION ON LT INBOARD SEAT TRACK FROM FR 41 TO FR 47, Y765. CORROSION WAS FOUND TO BE OUT OF LIMITS IAW AIRBUS 320 SRM 53-31-15 FIG 101. MAINTENANCE REMOVED SEAT TRACK FROM FR 41 TO FR 47, Y765 IAW AIRBUS 320 SRM 51-42-11. RECEIVED NEW SEAT TRACK AND INSTALLED FROM FR 41 TO FR 47 AND Y765 IAW AIRBUS 320 SRM 51-42-11 AND 51-72-11.