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 RH SHEAR PANEL AT FR87. AAR MX REPLACED PN 170-91919-001 CENTER FUSELAGE 3 FLOOR STRUCTURE RH SHEAR PANEL AT FR87 IAW SRM 51-42-01. SEE AAR NRC # 4500861-1000-0034 FOR WORK PERFORMED. AC REMAINS IN YQG FOR COMPLETION.