As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING FLIGHT AFTER SWITCHING TO APU BLEED AIR, GOT SMOKE IN CABIN AND COCKPIT. SMOKE WAS BLUE WITH OILY SMELL. SMOKE CLEARED AFTER SWITCHING BLEEDS BACK TO ENGINES. AIRCRAFT REMOVED FROM SERVICE. REMOVED AND CLEANED WATER SEPARATOR COALESCER THEN PUT IT IN PLACE OPS CHECK GOOD AT THIS TIME IAW AWAC SUP 14-193. C/W AWAC SUP 09-037E NO ODERS OR SMOKE NOTED.