As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DAMAGE TO THE AFT UPPER FRAME (P/N: 350A21-1242.35) IN THE FORM OF CORROSION. THE CORROSION DAMAGE IS ON THE UPPER FLANGE OF FRAME AT LH AND RH BOTTOM SIDE NEAR THE AFT LOWER FRAME. THE LH SIDE CORROSION DAMAGE MEASURED TO BE APPROXIMATELY 0.71: X 2.05” AND THROUGH THICKNESS DEPTH. THE RH SIDE CORROSION DAMAGE MEASURED TO BE APPROXIMATELY 0.573” X 0.71” X 0.015”.