What was found
(CAN) WHILE 4 MILES FINAL FOR AIRPORT THE OIL PRESSURE LIGHT ILLUMINATED FOLLOWED A LOW PRESSURE INDICATION ON THE PRESSURE GAUGE, 4 PSI AND DECREASING RAPIDLY. POWER REDUCED, ENGINE SHUTDOWN, PAN DECLARED WITH THE TOWER. PRIORITY CLEARANCE WAS GIVEN TO LAND. A RUN ON LANDING WAS MADE AT A LOW POWER SETTING. ACFT TAXIED TO RAMP. ROOT CAUSE: ENGINEERS INSPECTED AND FOUND BROKEN DRIVE SHAFT ON THE OIL PUMP.