As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
BULK CARGO CEILING LT SIDE AT ZONE 161 JUST AFT OF FLOOR SUPPORT BEAM AT STA 1540 THERE IS A CORRODED MAIN CARGO FLOOR SUPPORT. R & R FLOOR SUPPORT TEE (BEAM) AT STA 1540 IAW DWG 146T0051 & SRM 51-40-02, PG 4, PAR 7. ACFT WAS GROUNDED.