What was found
WHILE AIRCRAFT WAS IN HEAVY CHECK MAINTENANCE FOUND THE CENTER SHEAR PANEL FRAME 87 TO 88 CORRODED. MAINTENANCE REMOVED AND REPLACED CENTER SHEAR PANEL FRAME 87 TO 88 IAW EMB 175 SRM 51-10-02, 51-42-01, 51-40-02, AND 51-23-06. THE AIRCRAFT IS OUT OF SERVICE IN HEAVY CHECK.