What was found
AFT MOST CABIN SEAT TRACK RBL 23 SHOWS SIGNS OF CORROSION. COMPLIED WITH ER/A 635190-14 PRI REV 0, ER/A 635190-14 PRI REV 1 AND FINAL ER/A 635190-14 REV ORIGINAL. CORRODED SEAT TRACK SECTION WAS REPLACED. (LP# 1701470; AIRCRAFT WAS GROUNDED)