What safety feature is indicated by FADEC in a gas turbine engine?

The selection of EGT regulation as the safety feature indicated by FADEC (Full Authority Digital Engine Control) in a gas turbine engine is accurate because EGT, or Exhaust Gas Temperature, is a critical parameter in monitoring the engine's performance and safety. FADEC systems are designed to continuously monitor engine operating conditions, including EGT, to ensure that the engine operates within safe temperature limits. By regulating EGT, FADEC helps prevent overheating, which can lead to engine damage or failure.

Additionally, EGT regulation is essential for optimizing engine performance and efficiency during various phases of operation, such as takeoff, cruise, and landing. The ability of FADEC to adjust fuel flow and other parameters in real-time based on EGT readings allows for a safer and more efficient engine operation overall.

While fuel system monitoring, compressor blade adjustment, and cool down periods are also important aspects of gas turbine operation, they are not directly controlled or indicated by FADEC in the same comprehensive and immediate manner as EGT regulation. Thus, this choice aligns closely with the primary functions of FADEC in ensuring both safety and optimal performance in gas turbine engines.