What was found
WHILE AIRCRAFT WAS IN HEAVY CHECK MAINTENANCE FOUND THE LEFT FORWARD SEAT TRACK AT FRAME 13 CORRODED. MAINTNENACE REMOVED AND REPLACED THE LEFT FORWARD SEAT TRACK IAW EMB 170 SRM 51-41-01, 51-41-02, 51-43-01, AND 51-43-02. THE AIRCRAFT IS OUT OF SERVICE IN HEAVY CHECK.