As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
WORKING FAULT T3F18E007KJYV LINE 920 STA 879 FLOOR BEAM FOUND CORROSION ON LWR. FWD STRAP ATA-53-05 INSP VERIFIED STEP 16 OUT OF SEQUENCE INSTALLED REPLACEMENT RADIUS FILLER P/N 143N5553-1 PER BOEING DWG. 143N5255 REQUIREMENT AND B757-200PF SRM 51-40-02-0G -0.