What was found
ON ENGINE START AT RMS FOR FLIGHT 507, FOUND SMOKE IN COCKPIT WHILE NR 3 ENGINE WAS RUNNING, ABORTED ENGINE START. MOTORED NR 3 ENGINE, FOUND ENGINE OIL LEAK AT GEARBOX OIL PUMP FITTING. TIGHTENED FITTING IAW MM CH 79 AND CLEANED INTAKE AREA. PERFORMED ENGINE RUN, NO SIGN OF SMOKE NOTED.