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 OM FWD FUSELAGE FLOOR SUPPORT DOUBLER AT FR 12-14 RH SIDE. REPLACED FWD FUSELAGE FLOOR SUPPORT DOUBLER PN 170-05663-003 IAW SRM 51-41-02, 51-43-02. SEE AAR NRC# 4500907-1000-0070 FOR WORK PERFORMED. AC WAS RTS.