As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
WHILE AC WAS IN FOR HVY CK CORROSION FOUND ON CENTER FUSELAGE 3 FLOOR STRUCTURE LH UPPER SHEET AT FR 85. AAR MX REPLACED PN 170-86101-001 CENTER FUSELAGE 3 FLOOR STRUCTURE LH UPPER SHEET AT FR 85 IAW SRM 51-41-01, 51-43-01. SEE AAR NRC# 4500861-1000-0031 FOR WORK PERFORMED. AC REMAINS IN YQG FOR COMPLETION.