What is the purpose of an accessory gearbox in an aircraft engine?

The purpose of an accessory gearbox in an aircraft engine is to provide power to engine accessories. This component serves as a critical link, transmitting mechanical power from the engine's main shaft to various accessories that require it to function effectively. These accessories can include fuel pumps, oil pumps, generators, and other systems essential for the engine's operation and the overall functioning of the aircraft.

By taking power from the engine, the accessory gearbox enables these components to operate independently of the engine thrust, ensuring that they can perform their functions reliably at the necessary speeds and with the necessary torque. This is crucial in maintaining optimal engine performance and ensuring that all auxiliary systems are supplied with the required energy to operate efficiently.