As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
CORROSION. CONFIRM DT EVALUATION FOR POSSIBLE FCS REPAIR LOWER SILL AT FR66 LEVEL OF STRG 23L AT AFT GALLEY AREA. REPLACED LOWER SILL AT FR66 TO FR68 AT LEVEL STR. 23L AFT GALLEY AREA AS PER SRM 51-72-11, SRM 51-42-11 AND DWG NO. D53480505.