Home Boeing Boeing 737 What is EDP on Boeing 737? (Engine Driven Pump)

What is EDP on Boeing 737? (Engine Driven Pump)

When it comes to aviation, safety and reliability are of utmost importance. The Boeing 737, one of the most popular aircraft in the world, is equipped with various systems that ensure the smooth operation of the aircraft. One crucial component that contributes to the functioning of these systems is the Engine Driven Pump (EDP). In this article, we will delve into the details of the Engine Driven Pump on the Boeing 737 and its significance in ensuring the efficient operation of the aircraft.

The Engine Driven Pump, as the name suggests, is a pump that is driven by the engine of the aircraft. It is responsible for pressurizing various fluids needed for the operation of different systems on the Boeing 737. The EDP plays a vital role in maintaining the hydraulic pressure required for functions such as the operation of landing gear, flaps, and brakes. It also provides hydraulic power for the flight controls, including the ailerons, elevators, and rudder.

The Functions of the Engine Driven Pump (EDP)

The Engine Driven Pump on the Boeing 737 has several essential functions that are critical to the safe operation of the aircraft:

The Hydraulic System

The Engine Driven Pump is a vital component of the hydraulic system on the Boeing 737. It provides the necessary hydraulic pressure to power various systems on the aircraft. The hydraulic system ensures the smooth operation of primary flight controls, landing gear, and other critical functions.

In the event of an engine failure, the EDP continues to provide hydraulic power, ensuring that the pilot retains control of the airplane. This redundancy is essential for the safety and reliability of the aircraft in emergency situations.

The Fuel System

The Engine Driven Pump also plays a crucial role in the fuel system of the Boeing 737. It pressurizes the fuel, ensuring that it flows smoothly and consistently to the engines. The pump maintains the required fuel pressure to meet the engine’s demands, ensuring optimal engine performance.

Without the Engine Driven Pump, the fuel flow to the engines would be compromised, leading to a decrease in engine power and potentially affecting the overall performance of the aircraft. Therefore, the EDP is essential for maintaining the fuel system’s efficiency and reliability.

The Cooling System

In addition to its role in the hydraulic and fuel systems, the Engine Driven Pump also assists in the cooling system of the Boeing 737. Heat is generated during the operation of the aircraft’s engines, and it needs to be dissipated to prevent overheating.

The EDP circulates the cooling fluid, also known as the engine oil, through the engine’s cooling system. This allows the engine to operate within its optimal temperature range, preventing any damage caused by overheating. The efficient functioning of the cooling system is crucial for the long-term reliability and lifespan of the engines.


The Engine Driven Pump (EDP) on the Boeing 737 is a critical component that ensures the reliable and safe operation of the aircraft. It plays a crucial role in the hydraulic, fuel, and cooling systems of the aircraft, providing the necessary pressure and power for their efficient functioning.

Without the Engine Driven Pump, the performance and safety of the Boeing 737 would be compromised. The EDP’s redundancy and reliability make it an essential component in emergency situations and normal operations alike.

Understanding the importance of the Engine Driven Pump helps us appreciate the intricate systems that work together to ensure the successful operation of the Boeing 737 aircraft. Now that we have delved into the functions of the EDP, we can better comprehend its significance in aviation and the crucial role it plays in maintaining the safety and reliability of the aircraft.

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