As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
WHILE IN HEAVY MX PERFORMING INSP, IT WAS NOTED THAT CTR FUSELAGE FWD KEELBEAM AT STA 777.65 AT WEB HOLE EDGE CORRODED. ROUTED OUT DAMAGE, FABRICATED DOUBLER REPAIR FROM 7075-0 .125" HEAT TREATED TO 7075 T6, INSTALLED REPAIR. NO OTHER DEFECTS NOTED. ACFT WAS RETURNED TO SERVICE.