What was found
WHILE AIRCRAFT WAS IN HEAVY CHECK MAINTENANCE FOUND THE RIGHT GUSSET AT FRAME 90 OUTBOARD SIDE CORRODED. MAINTENANCE REMOVED AND REPLACED THE RIGHT GUSSET AT FRAME 90 OUTBOARD SIDE IAW EMB 190 SRM 51-41-02, 51-40-02, 51-21-01, AND 51-41-02. THE AIRCRAFT IS OUT OF SERVICE IN HEAVY CHECK.