As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING HEAVY MAINTENANCE, (REF NR 2019-313369) CORROSION LOWER SILL LOC BTW FR66 TO 68 AT LEVEL STR23 AT AFT GALLEY AREA; REMOVED AND REPLACED LOWER SILL BTW FR66 TO FR68 AT LEVEL STR 23R AT AFT GALLEY AREA IAW SRM A 320-51-72-11 AND A320 51-72-11 AND DRAWING D53480505. TOOL USED P/N 500-197-30 S/N A18109017 DUE DATE APR-10-2020 ACCOMPLISHED. THIS IS CLASSIFIED AS MAJOR.