As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
PDX - UNUSUAL ODOR ON FLIGHT DECK ON THE GROUND. NOT MOVING FOR 10 MINUTES WITH BOTH ENGINES AND BLEEDS RUNNING. MAINTENANCE RAN FOR 5 MINUTES BLEED ON, 5 MINUTES BLEED OFF. COULD NOT DUPLICATE. RETURNED TO SERVICE. NO PARTS REPLACED. (A)