What is EO on Airbus A320? (Engine Out)

Engine Out (EO) refers to the condition where one of the engines on an aircraft, such as the Airbus A320, becomes inoperative during flight. This situation can occur due to various reasons, including engine failure, a sudden loss of power, or a technical malfunction. While engine failure is rare, it is crucial for pilots to be well-prepared and trained to handle such situations effectively.

In this article, we will delve into the concept of Engine Out (EO) on the Airbus A320 and explore the procedures and precautions involved in managing an engine failure during flight. Understanding EO operations is essential for both pilots and aviation enthusiasts to comprehend the complexity of aircraft systems and the measures taken to ensure safety in critical situations.

The Importance of Engine Out Procedures

Engine Out (EO) procedures play a vital role in aviation safety, as they outline the step-by-step actions that pilots need to take in the event of an engine failure during flight. These procedures are meticulously designed by aircraft manufacturers, such as Airbus, to ensure that flight crews are well-equipped to handle such emergencies.

On the Airbus A320, the EO procedures are detailed in the Aircraft Flight Manual (AFM), which provides comprehensive guidance for pilots to follow in case of engine failure. These procedures are continuously reviewed and updated based on new technologies, industry standards, and safety regulations.

One of the primary objectives during an engine failure is to maintain the aircraft’s stability and control to ensure a safe landing. Pilots are trained to assess the situation quickly, identify the failed engine, and take appropriate actions to compensate for the loss of power.

Managing an Engine Out Situation on the Airbus A320

When facing an engine failure on the Airbus A320, pilots follow a specified sequence of procedures, referred to as the “Engine Failure After V1” procedure. V1 is a critical speed during takeoff, beyond which the aircraft must continue its takeoff even if an engine failure occurs.

Once an engine failure is detected, pilots first ensure that the aircraft is under control and fly at a safe speed, referred to as the “Single Engine Climb Speed.” This speed allows the aircraft to maintain stability and climb with limited power from the remaining engine.

Next, the pilots assess the performance capability of the aircraft with one engine and calculate the necessary adjustments in speed and altitude to continue the flight safely. The Airbus A320 has specific performance charts and tables to assist pilots in determining the required parameters and limitations.

To compensate for the loss of power, pilots must make adjustments to the flight controls, such as using rudder inputs to counteract the asymmetric thrust produced by the operating engine. They may also need to re-trim the aircraft for the new configurations to maintain its stability.

Throughout the EO operation, pilots communicate with air traffic control (ATC) to inform them about the situation and request for any necessary assistance, such as priority landing or alternative routes. Effective communication with ATC is crucial in ensuring a coordinated response and prioritizing the safety of the aircraft and its occupants.

Preventive Measures and Redundancy Systems

The Airbus A320, like modern commercial aircraft, incorporates several preventive measures and redundancy systems to minimize the chances of an engine failure and enhance flight safety.

One such system is the Full Authority Digital Engine Control (FADEC), which controls and monitors the engine’s performance in real-time. FADEC continuously adjusts and optimizes various engine parameters to ensure efficient and safe operation. In the event of an anomaly or failure, FADEC provides pilots with essential information and alerts to assist them in managing the situation.

Furthermore, the Airbus A320 is equipped with a dual-engine hydraulic system, which ensures the availability of hydraulic power even if one engine fails. This redundancy system allows pilots to maintain essential flight controls, such as the landing gear, flaps, and spoilers, even in an Engine Out scenario.

Additionally, the Airbus A320 is designed with aerodynamic features that provide improved performance during single-engine operations. These features include the use of wing spoilers to control roll and reduce drag, allowing the aircraft to maintain stability and control with a single operating engine.

The integration of these preventive measures and redundancy systems in the Airbus A320 reflects the aircraft industry’s commitment to enhancing flight safety and ensuring the ability to handle critical situations effectively.


Engine Out (EO) situations on the Airbus A320 demand quick thinking, effective decision-making, and precise execution from pilots. Understanding the procedures and precautions involved in managing engine failures is of utmost importance to ensure the safety and well-being of the aircraft and its occupants.

By following the well-established EO procedures and leveraging the aircraft’s advanced systems, such as FADEC and hydraulic redundancy, pilots can navigate through Engine Out scenarios with confidence and maintain control of the aircraft. The continuous advancements in aviation technology and the industry’s dedication to safety contribute to making commercial air travel safer than ever.

For More: What is ECAM on Airbus A320? (Electronic Centralized Aircraft Monitoring)