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 EXTERIOR FUSELAGE AT FR 45 WING TO BODY PANEL AFT RIB LH SUPPORT RIB U-CHANNEL FOUND CORRODED. MX REPLACED SUPPORT PN 170-02456-003 IAW SRM 51-41-02 SEE AAR NRC# 4500976-1000-0209 FOR WORK PERFORMED. AC REMAINS IN YQG FOR COMPLETION.