As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
PDX - C1 CHECK - RIVET HEADS ABOVE INNER SKIN ON WEB X528 TO X534 ON THE RIGHT SIDE BELOW SEAT TRACK 8/9 SUSPECT LIGHT CORROSION. MAINTENANCE REMOVED RIVETS AND BLENDED CORROSION FROM WEB, REMAINED WITHIN LIMITS AND INSPECTED NO CRACKS NOTED. INSTALLED NEW RIVETS AND RESTORED FINISH TO REPAIR AREA.