74309d7132 There was little initial interest in the engine, but Boeing realized that the CFM56 might be a solution to upcoming noise regulations. After announcing that a 707 would be configured with the CFM56 engine for flight tests in 1977, Boeing officially offered the 707-320 with the CFM56 engine as an option in 1978. 2006. The air passes through internal channels in each blade and ejects at the leading and trailing edges.. Reliability. The new variant was listed as the 707-700. Due to limited interest from the airlines in a re-engined 707, Boeing ended the 707-700 program in 1980 without selling any aircraft. Despite the lack of sales, having the commercial 707 available with the CFM56 helped the engine's competitiveness for the KC-135 re-engine contract..
Airbus Weighs Modified CFM56-5 Upgrade Options. 10th AIAA(American Institute of Aeronautics and Astronautics)/CEAS Aeroacoustics Conference (Manchester, Great Britain). CFMI modified the engines by adding a sensor to force the combustor to continuously ignite under these conditions.. AIAA/AHS/ASEE Aircraft Design, Systems, and Operations Conference. Retrieved 13 May 2010. Retrieved 19 May 2010. Fan blade failure.