What was found
WHILE AIRCRAFT WAS IN HEAVY CHECK MAINTENANCE FOUND FLOORBEAM FRAME 84 CORRODED. MAINTENANCE REMOVED AND REPLACED THE FRAME 84 FLOORBEAM IAW EMB 170 SRM 51-40-02, 51-41-02, 51-41-01, 51-43-02, 51-41-11, AND 51-43-02. THE AIRCRAFT IS OUT OF SERVICE IN HEAVY CHECK.