What was found
(CAN) MAJOR OIL LEAK ON RT ENGINE CAUSING LOSS OF OIL, RESULTING IN OIL PRESSURE FLUCTUATIONS & VARYING PROP PITCH CONTROL. PILOT INITIATED AN INFLIGHT FEATHER OF PROPELLER & ENGINE SHUTDOWN. DURING GND SPOOLING WITH REPLENISHED OIL SYS RUNNING, LEAK FOUND AT FITTING ON BETA T FITTING. LINE REPLACED & GROUND RUNS CARRIED OUT. FILTER REPLACED & CHIP DETECTOR INSPECTED PRIOR TO GROUND RUNS. PILOT NOTED NO TOTAL LOSS OF OIL PRESSURE DURING SHUTDOWN. MAXIMUM POWER RUNS COMPLETED, SERVICEABLE & CHIP DETECTOR INSPECTED AFTER RUNS. NO CONTAMINATION FOUND.