What was found
DURING HEAVY MAINTENANCE, CORROSION WAS DISCOVERED ON THE MAIN CABIN SHEAR PLATE BETWEEN FRAMES 69 & 70. FOUND TO BE OUT OF LIMITS IAW SRM 53-41-17. REMOVED THE SHEAR PLATE IAW SRM 51-42-11, RECEIVED, LOCATED, DRILLED, DEBURRED AND INSTALLED A NEW SHEAR PLATE IAW SRM 51-42-11, AND DWG D53471123.