As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
(AIRCRAFT 5645, L/P 1407279) WORN ON FLOOR STRINGER LBL 7.55, FROM STA. 1440 TO 1495 AT AFT CARGO COMPARTMENT FLOOR STRUCTURE. CORRECTIVE ACTION: (CORROSION LEVEL2) REPAIRED PER B757-200 SRM 53-00-53-2R REPAIR 1. (ET) (HFEC) WAS / ACCOMPLISHED AFTER TRIM OUT AND NO CRACKS WERE FOUND PER B757-200 SRM 53-00-53-2R-1 PAR. 4.C. & B757 NDTM PART 6, 51-00-19.