What was found
WHILE AIRCRAFT WAS IN HEAVY CHECK MAINTENANCE FOUND THE SHEAR TIE AT FRAME 88 STRINGERS 27R AND 28R CORRODED. MAINTENANCE REMOVED AND REPLACE SHEAR TIE IAW EMB 170 SRM 51-40-02, 51-41-02, AND 51-43-01. THE AIRCRAFT IS OUT OF SERVICE IN HEAVY CHECK.