What components are included in the accessory gear box?

The accessory gear box is a critical component in many aircraft engines, responsible for housing and driving several accessories needed for engine operation. The correct choice lists three pumps, two generators, and one air turbine starter, which accurately reflects the typical configuration found in many aircraft engines.

The three pumps often include fuel pumps and oil pumps, which are essential for maintaining the necessary fluids for engine operation. The two generators are crucial for supplying electrical power to the aircraft's systems during flight. Lastly, the air turbine starter is an important element that helps initiate the engine's operation by providing the initial rotation required for the engine to start.

In contrast, the other options do not accurately represent the standard configuration of the accessory gear box, either by under-representing or misrepresenting the number and type of components typically included. This understanding of the accessory gear box's components is essential for recognizing how engine systems work together in aviation mechanics.