What was found
PILOT REPORTED LT ENGINE N1 AND TORQUE DECREASED CONTINUOUSLY IN FLIGHT TORQUE, WHEN TORQUE REACHED ZERO. DIVERTED, SECURED THE LT ENGINE, LANDED WITHOUT INCIDENT. REPLACED LT ENGINE FUEL TO OIL HEATER. OPS CHECKED GOOD, TEST FLIGHT SATISFACTORY. PREVIOUSLY SUBMITTED (OPEN GUUA94531031511A)