Abstract: A control system for use in gas turbine engines simultaneously provides for improved engine efficiency and extended engine life without sacrificing engine performance. The control system is characterized by both standard and extended engine life (EEL) operating modes. The extended engine life (EEL) mode can be requested by the pilot during periods of less extreme flight maneuvers. The control system will, in response to pilot request, determine the current thrust provided by the engine and reconfigure the engine to provide that value of thrust at values of engine pressure ratio (EPR) as a function of engine airflow which produce a reduction in turbine inlet temperature.