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 FOUND CORROSION ON CENTER FUSELAGE 3 FLOOR STRUCTURE PANEL SUPPORT. MX REMOVED AND REPLACED PN 170-86181-005 CENTER FUSELAGE 3 FLOOR STRUCTURE PANEL SUPPORT IAW SRM 51-42-01. AC REMAINS IN YQG FOR COMPLETION. SEE NRC# 4500442-1000-0044 FOR WORK PERFORMED.