AI-727 - a family of ultra-high bypass geared turbofan engines with a thrust of between 9000kgf and 11000 kgf.
Following the crash, it is now mandatory to test all newly designed and significantly redesigned turbofan engines under representative flight conditions.
Turbojet and turbofan engines use a spinning turbine to drive one or more fans, which provide additional thrust.
The F-111 design also included new features on a production military aircraft, such as variable-geometry wings and afterburning turbofan engines.
Differences include two turbofan engines instead of one and greater maximum take-off weight.
It was powered by two turbofan engines with each in a separate engine nacelle on either side of the aircraft's spine.
Each jet in the series is powered by two turbofan engines.
The aircraft has two turbofan engines, a conventional tail, and, for reduced aerodynamic drag, a supercritical wing design.
The larger safety margins were permitted because of the improved reliability demonstrated by the twinjet and its turbofan engines.
In turbofan engines, laminar airflow is required at the face of the fan.