As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING HEAVY MAINTENANCE, CORROSION LOWER SILL LOCATED FLOOR STRUCTURE AT LEVEL STR23L FR66 TO FR68 AT AFT GALLEY AREA; CORROSION LOWER SILL LOCATED FLOOR STRUCTURE AT LEVEL STR23L FR66 TO FR68 AT AFT GALLEY AREA. ALL WORK PERFORMED ON AEROMAN NR 2019-309280.