What was found
ENROUTE, AT 20,000 FT ALTITUDE THE LT ENGINE POWER REDUCED TO 200 FT LBS AND FUEL FLOW TO 100 LBS PER HOUR AND N1 TO 70 PERCENT AND ITT 600 C. POWER LEVER HAD NO EFFECT AND PROP LEVER WAS RESPONDING NORMALLY. AT 12,000 FT IAW THE ACFT CHECK LIST THE ENGINE WAS SHUT DOWN AND SECURED AND A PRECAUTIONARY LANDING WAS MADE AT NEAREST AIRPORT. GROUND RUN UP CHECKS INDICATE THE FUEL CONTROL UNIT MAY BE AT FAULT AND AN O/H UNIT IS ON ORDER. MORE DETAILS WILL BE MADE AVAILABLE AS SOON AS PRACTICLE AFTER REPAIRS ARE MADE.