As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING HEAVY MAINTENANCE, CORROSION WAS DISCOVERED ON LOWER SILL RT SIDE AFT GALLEY AREA; R & R LOWER SILL LOCATED FR66 TO FR68 AT LEVEL STR 23R SIDE AT AFT GALLEY AREA IAW SRM 51-72-11 AND DWR# D53480505. THIS PART IS CONSIDERED AS PSE AND FCSIAW SRM 51-11-12 FIG 020. WORK PERFORMED ON W/O 2019-310/1 N/R 2019-302843.