As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
PDX- GEAR DOOR LIGHTS ILLUMINATED AT 24,000 FEET, A THUMP WAS HEARD IN THE COCKPIT FLOOR AREA. LANDING WAS UNEVENTFUL. MAINTENANCE REPLACED THE PSEU AND PERFORMED GEAR SWINGS, OPERATIONAL CHECKS GOOD. BITE CHECK OF PSEU ALSO CHECKS GOOD.