What was found
WHILE AIRCRAFT WAS IN HEAVY CHECK MAINTENANCE FOUND THE RIGHT SEAT TRACK BETWEEN FRAMES 85 AND 86 CORRODED. MAINTENANCE REMOVED AND REPLACED THE RIGHT SEAT TRACK BETWEEN FRAMES 85 AND 86 IAW EMB 170 SRM 51-43-03, 51-40-02, 51-43-02, 51-43-01, AND 51-23-06. THE AIRCRAFT IS OUT OF SERVICE IN HEAVY CHECK.