Which are produced in a partnership of GE and some French company.
50/50 joint venture between GE and SNECMA of France. GE has always designed and built the core (HPC, combustor, and HPT) and SNECMA has provided the low pressure compressor and low pressure turbine. GE provides the electronic control unit as well (the brains of the engine and the interface w/the aircraft). CFM engines are the most prevalent commercial fan engine in the world—various models powering the B737 (except the -200), A320, A340.