As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
PDX - AFTER DEPARTURE, THE AIRCRAFT FILLED WITH SMOKE. TURNED BLEEDS OFF. SMOKE DID NOT SEEM TO GET WORSE. RETURNED TO FIELD. REMOVED AND REPLACED AUXILIARY POWER UNIT IAW MAINTENANCE TASK CARD 8491001. GROUND RAN AIRCRAFT. NO SMOKE NOTED IN COCKPIT OR CABIN.