As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
PDX - C1 CHECK - SUSPECT LIGHT CORROSION FORMING ON WEB TIE RIVET HEADS BELOW FLOOR AND SEAT TRACK. MAINTENANCE REMOVED RIVETS AND BLENDED OUT CORROSION, INSPECTED, REMAINED WITHIN LIMITS AND NO CRACKS NOTED. INSTALLED RIVETS AND RESTORED FINISH TO REPAIR AREA.