Viking/Turbo-Viking 17-30/31
Flight Crew Commercial; Flight Crew Instrument
Flight Crew Last 90 Days 30; Flight Crew Total 550; Flight Crew Type 14
Aircraft Equipment Problem Critical
Air Traffic Control Issued New Clearance; Air Traffic Control Provided Assistance; Flight Crew Diverted; Flight Crew Landed in Emergency Condition; General Maintenance Action
Aircraft
Audible noise; EGT gauge went to 0; limited to no engine response to throttle inputs; engine was still running at reduced power.I was not able to maintain the ATC assigned altitude at 5;000 ft. I proceeded direct to RWY XX at ZZZ. Traffic was on final on RWY XYL. Traffic was in sight and we proceeded to RWY XX via reduced power glide. [Requested priority handling] with ZZZ Approach. Received clearance to land from ZZZ Tower. Landing was uneventful. Engine cut off as throttles were pulled to idle in the flare. Spoke with emergency responders while stopped on RWY XX just shy of the 5;000 ft. marker. There was no fire; no FOD (Foreign Object Debris); and the engine was not frozen. I elected to restart the motor and it was successful. Engine behaved normally at low power setting with the exception of the EGT gauge still being at 0. I taxied from RWY XX to the FBO. Uneventful taxi and shutdown.
Pilot reported engine was unresponsive to throttle movement and running at reduced power; causing a diversion and reduced power glide; with engine failing on touchdown.