As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
PDX - C1 CHECK - MAIN CABIN DOOR THRESHOLD HAS LIGHT CORROSION AT 5 EA NUTPLATES. MAINTENANCE REMOVED MCD THRESHOLD AND NUTPLATES. REMOVED LIGHT SURFACE CORROSION FROM LOWER SILL PLATE AND INSPECTED, BLENDED AREA REMAINED WITHIN LIMITS WITH NO CRACKS NOTED. INSTALLED NEW NUTPLATES.