As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
CORROSION ON TOP SURFACE OF MAIN FRAME, AFT CARGO COMPARTMENT FLOOR STRUCTURE BS 1197 RBL 22, LBL 42 & RBL 5.5. FLOOR STRUCTURE WAS FOUND TO BE OUT OF LIMITS IAW SRM 53-60-07 & 53-00-07 FIG 10 1 DET III. R & R UPPER CHORD IAW SRM 51-40-02 PAR A 4 FIG 3 & 8, SRM 53-60-07 & DWG 146T1206.