The General Electric CF6 is a family of high-bypass turbofan engines. A development of the first high-power high-bypass jet engine available the TF39 the CF6 powers a wide variety of civilian airliners. The basic engine core formed the basis for the LM2500 LM5000 and LM6000 marine and power generation turboshaft. GE Aviation intends to replace the CF6 family with the GEnx.