What was found
WHILE AIRCRAFT WAS IN HEAVY CHECK MAINTENANCE FOUND THE LEFT FF FLOORBEAM FITTING CORRODED FRAME 15 TO 18. MAINTENANCE REMOVED AND REPLACED LEFT FF FLOORBEAM FITTING IAW EMB 190 SRM 51-41-01, 51-41-02, 51-43-02, AND 51-43-01. THE AIRCRAFT IS OUT OF SERVICE IN HEAVY CHECK.