What was found
A BRIEF OCCURRENCE OF SMOKE COMING FROM FIRST OFFICER LARGE GASPER. INSPECTED AIRCRAFT ACM FOR OIL CONTAMINATION AND APU COMPARTMENT FOR ABNORMALITIES. NONE WERE NOTED, PERFORMED ENGINE RUN UP AND CYCLED BLEEDS NO DEFECT NOTED. REQUESTED AN ACCEPTANCE FLIGHT, ACCEPTANCE FLIGHT COMPLETED. NO DEFECTS WERE NOTED. PRECAUTIONARY REPLACED RECIRCULATION FAN P/N 778728-6, S/N 860375. (M)