As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
PDX - C1 CHECK - SUSPECT CORROSION AROUND RIVET ON VERTICAL FRAME SUPPORT FOR NR 4 SEAT TRACK AT STA X370.00 INBOARD OF STRINGER 31L BOTTOM MOST INBOARD RIVET. MAINTENANCE REMOVED RIVET BLENDED OUT CORROSION, INSPECTED, REMAINED WITHIN LIMITS AND NO CRACKS NOTED. INSTALLED RIVET AND RESTORED FINISH TO REPAIR AREA.