What is FADEC on Airbus A320? (Full Authority Digital Engine Control)

The Full Authority Digital Engine Control (FADEC) system is a key component of the Airbus A320 aircraft. It is an advanced electronic control system that provides precise, automated control of the aircraft’s engines. FADEC technology has revolutionized the aviation industry by significantly enhancing the efficiency, performance, and safety of modern aircraft engines. In this article, we will explore the functions and benefits of FADEC on the Airbus A320.

Understanding Full Authority Digital Engine Control (FADEC)

Full Authority Digital Engine Control (FADEC) is a computerized system that manages all aspects of engine operation, including fuel flow, engine starting, and thrust control. It consists of several components, including a digital computer, engine sensors, actuators, and a data bus.

The digital computer, known as the Engine Electronic Control Unit (EECU), is the brain of the FADEC system. It receives inputs from various engine sensors, such as temperature, pressure, and speed probes, and processes these inputs to determine the optimal engine operating parameters. Based on these calculations, the EECU commands the actuators to adjust fuel flow, engine speed, and other parameters to maintain optimal engine performance.

The FADEC system also incorporates redundancy to ensure fault tolerance and system reliability. It typically consists of two separate channels with their own EECUs, sensors, and actuators. This dual-channel configuration provides a backup in case of a failure in one channel, ensuring that the engine continues to operate safely and efficiently.

Functions and Benefits of Full Authority Digital Engine Control (FADEC)

Precise Control of Engine Parameters

One of the primary functions of FADEC is to provide precise control of engine parameters, such as fuel flow, engine speed, and thrust. By continuously monitoring and adjusting these parameters, FADEC ensures optimal engine performance in various flight conditions, including takeoff, climb, cruise, and descent. This precise control results in improved fuel efficiency, reduced emissions, and extended engine life.

For example, during climb and cruise, FADEC adjusts the fuel flow and engine speed to maintain the desired thrust level while optimizing fuel consumption. This not only reduces operating costs but also minimizes environmental impact by reducing carbon dioxide (CO2) emissions and noise levels.

Automated Engine Starting

FADEC also automates the engine starting process, simplifying the pilot’s tasks and enhancing safety. Instead of manually controlling the fuel flow, ignition, and other parameters during startup, the pilot only needs to engage the start switch. The FADEC system takes care of the rest, precisely controlling the starting sequence and ensuring a smooth and reliable engine startup.

In addition, FADEC continuously monitors engine parameters during the startup process, automatically detecting and responding to any abnormalities. This proactive monitoring helps to prevent engine stalls, surges, or other malfunctions, improving overall safety.

Integrated Engine Health Monitoring

FADEC also incorporates an integrated Engine Health Monitoring (EHM) system, which constantly monitors the engine’s condition and performance. The EHM system collects data from various sensors and analyzes it to detect any signs of engine degradation or impending failures.

By detecting potential issues at an early stage, FADEC enables proactive maintenance planning, reducing the risk of in-flight emergencies and unscheduled maintenance events. This proactive approach to engine health monitoring enhances the overall reliability and availability of the aircraft.

Furthermore, the EHM system can transmit real-time engine performance data to ground maintenance systems, allowing maintenance crews to monitor and diagnose the engines remotely. This capability enhances maintenance efficiency and reduces turnaround times.


The Full Authority Digital Engine Control (FADEC) system is a vital technology on the Airbus A320 aircraft, providing precise control of engine parameters, automated engine starting, and integrated engine health monitoring. With its advanced capabilities, FADEC enhances the efficiency, performance, and safety of the A320’s engines, resulting in tangible benefits for airlines and passengers alike.


1. “Full Authority Digital Engine Control (FADEC).” Airbus Services. https://services.airbus.com/en/aircraft-support/flight-operations-support/pilot-and-crew-training/full-authority-digital-engine-control.html

For More: What is HLD on Airbus A320? (Hold)