As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FLYING FROM POCATELLO TO TWIN FALLS, PILOT ENCOUNTERED ABNORMAL TORQUE CHANGES IN NR 1 ENGINE. IT HAPPENED TWICE. PILOT NOTED LOW OIL PRESSURE, THEN NO OIL PRESSURE. THE NR 1 ENGINE IS SHUT DOWN IN-FLIGHT AND A LANDING WAS MADE AT BURLEY AIRPORT. NO EXTERNAL OIL LEAKS FOUND. OIL LEVEL ALMOST AT MAXIMUM AT THE DAILY INSPECTION. SUBMITTER SUGGESTED PROBLEM INTERAL TURBINE OR GEARBOX SEAL.