Which parameter does FADEC help protect against exceeding limits?

FADEC, or Full Authority Digital Engine Control, plays a critical role in managing and monitoring engine performance, particularly in ensuring that various engine parameters remain within safe operating limits. One of the primary functions of FADEC is to monitor turbine temperature, also referred to as Maximum Gas Temperature (MGT), which is a critical factor in ensuring the integrity and longevity of the engine.

Exceeding turbine temperature limits can lead to severe engine damage, including potential turbine blade failure or overall engine degradation. FADEC uses sophisticated algorithms and real-time data to regulate engine performance and make adjustments as needed, ensuring the MGT stays within predefined limits. This protective function is vital for overall operational safety and efficiency, ultimately contributing to the aircraft's reliability and performance.

The other parameters provided in the choices, while important in their respective contexts, are not primarily regulated by FADEC. Flight altitude is typically managed by the aircraft's autopilot systems and flight management systems rather than the engine control system. Fuel efficiency is a goal of FADEC but not a specific limit that requires protection in the same way turbine temperature does. Weight balance, while crucial for flight safety, relates more to airframe design and load distribution rather than direct engine management.