Narrative:

During solo VFR cruise at 17;500 ft with flight following and upon initial attempt to begin descent; I was unable to reduce engine power below approximately 97%. This was due to a restriction in throttle movement that prohibited it from moving aft. After inspection of the throttle and throttle area for possible defects or foreign objects; I determined that there was no way to reduce power from the cockpit; other than an emergency engine shutdown. I informed center of this problem and requested a diversion to the main airport for longer runways and enhanced emergency equipment and personnel. I told center I would need their help to manage my energy and get the jet to the runway and then I would use an emergency procedure to permanently shut down the engine and attempt a dead stick landing. Because this was an emergency; I deviated from the prohibition in my operating limitations; related to flying in class B airspace. I suspect my speed exceeded 250 KTS; possibly several times; while either below 10;000 ft or within class B airspace; because I was struggling with the combination of descent and thrust; while at such a high power level. Otherwise; I was generally able to comply with all of ATC requests for altitude and headings. During descent; I reviewed my in flight emergency procedures and wrote down the key items I needed to execute for successful outcome. It was difficult to get slow enough to lower landing gear and flaps; but I managed to use 2 G turning and maneuvering to allow such on final approach. As I reached the threshold of the runway; I pulled the emergency hydraulic interconnect to assure full braking capabilities after engine shutdown and then used the emergency engine shutdown switch; which causes a permanent engine shutdown. The engine thrust subsided immediately and I made a dead stick landing. After landing; I was able to fully exit the runway and park at the extreme edge of the taxiway; where I shutdown all systems; after confirming with ground control. There was no damage to the aircraft or any airport facilities and we recovered the aircraft by towing to a commercial FBO on the airport property.

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Original NASA ASRS Text

Title: An L39's throttle became stuck at 97%. The pilot requested ATC's help for vectors to a suitable airport and then maneuvered using G forces to slow for gear and flap extension. On short final the engine was shut down for a successful dead stick landing.

Narrative: During solo VFR cruise at 17;500 FT with flight following and upon initial attempt to begin descent; I was unable to reduce engine power below approximately 97%. This was due to a restriction in throttle movement that prohibited it from moving aft. After inspection of the throttle and throttle area for possible defects or foreign objects; I determined that there was no way to reduce power from the cockpit; other than an emergency engine shutdown. I informed Center of this problem and requested a diversion to the main airport for longer runways and enhanced emergency equipment and personnel. I told Center I would need their help to manage my energy and get the jet to the runway and then I would use an emergency procedure to permanently shut down the engine and attempt a dead stick landing. Because this was an emergency; I deviated from the prohibition in my operating limitations; related to flying in Class B Airspace. I suspect my speed exceeded 250 KTS; possibly several times; while either below 10;000 FT or within Class B Airspace; because I was struggling with the combination of descent and thrust; while at such a high power level. Otherwise; I was generally able to comply with all of ATC requests for altitude and headings. During descent; I reviewed my In Flight Emergency procedures and wrote down the key items I needed to execute for successful outcome. It was difficult to get slow enough to lower landing gear and flaps; but I managed to use 2 G turning and maneuvering to allow such on final approach. As I reached the threshold of the runway; I pulled the emergency hydraulic interconnect to assure full braking capabilities after engine shutdown and then used the emergency engine shutdown switch; which causes a permanent engine shutdown. The engine thrust subsided immediately and I made a dead stick landing. After landing; I was able to fully exit the runway and park at the extreme edge of the taxiway; where I shutdown all systems; after confirming with Ground Control. There was no damage to the aircraft or any airport facilities and we recovered the aircraft by towing to a commercial FBO on the airport property.

Data retrieved from NASA's ASRS site as of April 2012 and automatically converted to unabbreviated mixed upper/lowercase text. This report is for informational purposes with no guarantee of accuracy. See NASA's ASRS site for official report.