In May 2010, Sikorsky announced an engine upgrade for the CH-148 Cyclone by the end of 2012. General Electric was developing a new engine version based on the CT7-8A1. The CT7-8A1 makes the CH-148 Cyclone heavier and less efficient than expected. General Electric developed the CT7-8A7 to be certified by June 2012 and eventually integrated into the Cyclone as soon as possible. General Electric developed the upgraded engine at its own expense. The new CT7-8A7 engine version produces 10% additional horsepower. The CT7-8A7 included modifications to the fuel manifold and nozzles. Interim CH-148s were to be provided with CT7-8A1 engines.