As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
PDX - LAVATORY SMOKE DETECTOR SOUNDED ON TAXI OUT WITH A SMELL AND HAZE AROUND LAVATORY AND ENTIRE CABIN. REPLACED NUMBER 2, 2.5 AND P-3 AIR PRESSURE VALVES. RAN BLEEDS UP TO RED LINE. NO HAZE OR SMOKE NOTED. NO CHANGE IN ENGINE OIL LEVEL NOTED.