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 NR 2018-143175 FLOORBEAM +Y1292 AT LEVEL FR 66 IN PASSENGER CABIN; REF BP NR 2018-143175 REPLACED FLOORBEAM +Y1292 AT LEVEL FR 64 TO FR 66 IN PASSENGER CABIN IAW SRM 51-72-11 AND DRAWING D53472815 TOOL USED CALIPER P/N 500-172-30 S/N 14519392 DUE DATE MAY 23 2018.