What was found
SMOKE IN COCKPIT BEGAN SHORTLY AFTER INITIAL DESCENT INTO SLC. COMPLETED SMOKE SOURCE I.D. EMERGENCY CHKLST & AIR CON SYS SMOKE EMERGENCY CHKLST. SMOKE BEGAN TO DISSIPATE AFTER ENG 1 & 2 BLEEDS REVERSED. RAN NR 1, 2 & 3 ENGINES WITH BLEEDS & PACKS ON, NO EVIDENCE OF SMOKE OR FIRE. RAN ENGINES AT ALL PWR SETTINGS AND MIX VALVES AT ALL SETTINGS TO DUPLICATESMOKE COND, NO SMOKE NOTED EXCEPT FOR SLIGHT CARBON ODOR. INSPECTED AIR COND BAY AND BOTH PACKS AND FOUND LH WATER SEPERATOR COALESCER BAG FILTER CONTAMINATED WITH OIL AND CARBON RESIDUE. R AND R LH WATER SEPERATOR FILTER AND RAN PACKS WITH ENG AND APU BLEED AIR, SYST CKS GD. MX