What was found
R/H I/B SEAT TRACK AFT END CORRODED AT FR 74 RBL 23 WL 151.5. REMOVED AND REPLACED SEAT TRACK R/H I/B, FROM FR60-FR74 RBL 23 IAW A220 ASRP BD500-A-J51-42-21-00AAA-078A-A AND BOMBARDIER DWG PL C01342701 REV-G. (LP# 1563944; AIRCRAFT GROUNDED)