Which type of pump is NOT included in the 8 pumps of the T-6A?

The auxiliary pump is not part of the eight pumps that are typically identified in the T-6A's fuel system. The T-6A is equipped with various pumps that serve specific purposes within its fuel management system, such as ensuring proper fuel delivery and maintaining system pressure.

The boost pump, for example, plays a crucial role in supplying pressurized fuel to the engine. The primary jet pump is designed to utilize fuel flow to create suction, drawing additional fuel from the tanks to maintain adequate supply. Similarly, the low pressure pump contributes to the overall functionality of managing fuel under various operational conditions.

Since the list of pumps recognized in the T-6A fuel system doesn't include the auxiliary pump, identifying it as the correct answer highlights a specific understanding of the aircraft's fuel system configuration. Each identified pump serves a distinct and functional purpose in the management and delivery of fuel throughout the aircraft, whereas the auxiliary pump is not part of that established configuration in this context.