Textron Still Keen On Citation Hemisphere Textron Aviation is still keen on the Cessna Citation Hemisphere, their perceived flagship model. The company had put a stop on development of the new top-of-the-line jet because of issues relating to the Snecma Silvercrest powerplants. Snecma is actively working on a fix for the engines specifically relating to high-pressure axial compressor issues. That company is hoping that a fix would be available by July next year. This new fix is what Cessna/Textron are waiting on. All being equal, the Hemisphere isn't a dead project...yet.