What was found
WHILE AIRCRAFT WAS IN FOR HEAVY CHECK, MAINTENANCE REPORTED LEVEL 2 CORROSION ON THE SHEAR TIE AT FRAME 17, BETWEEN STR 25R AND 26R. MAINTENANCE REMOVED AND REPLACED THE SHEAR TIE IAW SRM 51-40-08, 51-40-02, AND 51-23-06. AIRCRAFT IS CURRENTLY STILL OUT OF SERVICE FOR HEAVY CHECK COMPLETION.