As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FLOORBEAM STA 756, RBL 30 UPPER SURFACE CORROSION BLENDOUT. DRILL START DAMAGE TO MAIN CARGO DOOR FWD FRAME BEYOND SRM LIMITS. THE BLEND IS ADJACENT TO FASTENER THAT WAS NOTED TO BE A NAS1097AD6 RIVET BY THE CUSTOMER AND HAS A 0.400" EDGE MARGIN. THE TEE IS FABRICATED FROM 7075-T6511 ALUMINUM EXTRUSION (EXT 1363992) AND IS 0.125" THIS AT THE REWORK LOCATION.