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 REF BP NON ROUTINE 2018-143273 LOWER SILL PASSENGER DOOR 842 AT AFT GALLEY. RPL LOWER SILL PAX DOOR 842 AFT GALLEY AREA IAW SRM 51-72-11 AND DRAWING D53480505. P2 LOC FR66+4.877 IN.