As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AFTER TAKEOFF AND AFTER TURNING ON THE BLEED AIR (MAV), A STRONG BURNING SMELL FILLED THE COCKPIT. IT APPEARED TO BE AN OIL SMELL. RAN AIRCRAFT AT VARIOUS SPEEDS. NO OIL SMELL DETECTED VISUALLY INSPECTED WATER SEPARATOR AND INCLUDED DUCTS. NO DEFECTS NOTED.