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 RAIL DUMMY Y 503.2 AT LEVEL OF FR16 AT FWD GALLEY AREA; REF NRC 2018-159156 W/O 909857 REPLACED RAIL DUMMY Y503.2 BTW FR12 TO FR16 AT FWD GALLEY AREA IAW SRM 51-72-11 AND DRAWING D53112825. PI LOC FR16 +0.100"