As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
PDX - C5 - CORROSION ON FLOOR BOARD NUT PLATE FLANGE UNDER PANEL 144BZ AT STATION 199.5 INBOARD OF SEAT TRACK. REMOVED NUTPLATE, BLENDED OUT CORROSION IAW DASH 8 200 CPM CHAPTER 4, FOUND TO BE WITHIN LIMITS IAW DASH 8 200 SRM 51-20-11. ALODINED AND PRIMED BLENDED AREA IAW DASH 8 200 SRM 51-20-16 AND 51-20-36. INSTALLED NUTPLATE IAW DASH 8 200 SRM 51-40-00.