As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
WHILE A/C WAS IN FOR HEAVY CHECK FOUND CENTER FUSELAGE 1 FLOOR STRUCTURE CORRODED AT CROSS BEAM AT FR 14 UPPER FLANGE RT SIDE. MX REPAIRED CROSSBEAM UPPER FLANGE, IAW SRM 53-00-10 REPAIR 03. SEE AAR NRC 4500788-2000-0102 FOR WORK PERFORMED. A/C REMAINS IN YQG FOR COMPLETION.