What was found
DURING HEAVY MAINTENANCE, CORROSION WAS DISCOVERED ON THE MAIN CABIN SHEAR PLATE BETWEEN FRAMES 69 - 70. REMOVED AND REPLACED THE SHEAR PLATE IAW DWG D53471124 REV. C.
As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
DURING HEAVY MAINTENANCE, CORROSION WAS DISCOVERED ON THE MAIN CABIN SHEAR PLATE BETWEEN FRAMES 69 - 70. REMOVED AND REPLACED THE SHEAR PLATE IAW DWG D53471124 REV. C.