What was found
WHILE AIRCRAFT WAS IN HEAVY CHECK MAINTENANCE FOUND THE LEFT FUSELAGE FORWARD SEAT TRACK BEAM CORRODED AT FRAMES 16 AND 17. MAINTENANCE REMOVED AND REPLACED THE LEFT FUSELAGE FORWARD SEAT TRACK BEAM IAW EMB 175 SRM 51-41-01, 51-41-02, 51-43-01, AND 51-43-02. THE AIRCRAFT IS OUT OF SERVICE IN HEAVY CHECK.