As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
CORROSION AFT CARGO RT TRANSITION PANEL AT BS 1310 TO BS 1380. HEAVY CORROSION BS 1343.5 TO BS 1380 AROUND GILL LINER ATTACH HOLES AND FLOOR PANEL ATTACH HOLES. DRILLED UP AND INSTALLED NEW TRANSITION PANEL 69-1/2" BY 7-1/2" P/N 146N5391U72 IAW B757 SRM 51-40-02.