As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
WHEN THE AIRFOIL ANTI-ICE WAS CYCLED TO TAIL MODE ON FINAL APPROACH, THE ICE PROTECTION SUPPLY PRESSURE HIGH LIGHT BEGAN TO FLICKER ON AND OFF ACCOMPANIED BY OIL SMELL AND SMOKE IN COCKPIT. THE ANTI-ICE WAS TURNED OFF AND THE SMOKE CEASED. THE ANTI-ICE SUPPLY PRESSURE SWITCH WAS REPLACED AND THE LT WATER SEPARATOR BAG WAS CHANGED. LEAK AND OPERATIONAL CHECKS WERE GOOD.