What was found
A/C DEPARTED CHEYENNE, WY, AFTER FUEL TOP OFF AND CLIMBING OUT THE LT ENGINE TORQUE DROPPED TO 2500 NR AND NG DROPPED 3 PERCENT. THE PILOT INCREASED THE POWER LEVERS, THE TORQUE ROSE AND THEN SETTLED BACK TO 2500 NR. THE CREW MADE A PRECAUTIONARY ENGINE SHUT DOWN AND MADE AN UNEVENTFUL LANDING AT LORAMY, WY. NO EMERGENCY WAS DECLARED. TOTAL FLIGHT TIME WAS .4 HRS. THE MECHANIC INSPECTED THE ENGINE FOR BLEED AIR, PY, P3 FOR LEAKS AND NO DEFECTS WERE NOTED. THE MECHANIC REMOVED AND REPLACED THE BLEED VALVE AND PERFORMED RUN CHECKS ON THE ENGINE IAW THE MM AND DECLARED THE ENGINE OK FOR RETURN TO SERVICE. THE AIRCRAFT CONTINUED THE FOLLOWING DAY WITH NO FURTHER OCCURRENCES. (M)