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 FOUND ON CENTER FUSELAGE 3 AFT CARGO FLOOR SUPPORT AT FR 80 AND STR 29R-29L. REPLACED SUPPORT PN 170-66353-001 IAW SRM 51-41-01 SEE AAR NRC# 4500917-1000-0103. FOR DETAILS OF WORK PERFORMED. AC REMAINS IN YQG FOR COMPLETION.