What was found
CAPT REPORTED SMOKE IN COCKPIT AND AFT GALLEY. AIR RETURN. CREW NOTICED THE ODOR & TURNED APU BLEED OFF, APU WAS NOT RUNNING. C BLEED AIR ISLN IAW 49-10 TASK 808 SMOKE INSPECTION PERFORMED APU INSPECTION. ONCE IN COCKPIT, NOTICED PACKS, STRONGER. ONCE AT CRUISE ALTITUDE, F/A IN AFT GALLEY VALVE OFF, L PACK OFF, L TRIM AIR OFF. NOTICED THE AMM 49-21-00 UP TO STEP B)3)B, FOUND OIL CONTAMINATION AT AIR APU BLEED WERE OFF. HE CYCLED APU BLEED AND BOTH PACKS TO ON. HE REPORTED SMELL AND A CLEAR/WHITE HAZE IN THE AIR. FIRST OFFICER SMOKE/SMELL STARTED TO DISSIPATE. WE WERE ABLE TO DUPLICATE. REPLACED APU