As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ON START THE PILOT NOTICED AND SMELLED OILY SMOKE IN CABIN. WHEN THE HEATER WAS TURNED OFF THE SMOKE DISAPATED. THE AIRCRAFT WAS SHUTDOWN. ON INSPECTION FOUND A CRACKED FRONT SUPPORT ON THE COMPRESSOR THAT WAS ALLOWING OIL INTO THE BLEED AIR HEATER. REMOVED AND REPLACED FRONT SUPPORT.