What was found
LEFT INBD SEAT TRACK AFT END HAD CORROSION, FR 74, LBL 23. REMOVED AND REPLACED THE LT INBD SEAT TRACK BTWN FR 57+13" TO FR 74+6", LBL 23 IAW DWG PL C01342701, REV G. & ASRP BD500-A-J51-42-20-00AAA-078A-A. (LP# 1786100; AIRCRAFT WAS GROUNDED)