Which item is NOT an Engine Module?

Which item is NOT an Engine Module?

• A. Cold Section
• B. Hot Section
• C. Power Turbine Section
• D. Mainframe

Answer: (D)

Understanding how the engine is built for a UH-60S helps you see why this item is not an engine module. The engine is organized into functional blocks: the cold section handles air intake and compression, the hot section contains the combustion process and the high-temperature pathway, and the power turbine section extracts energy from the hot gases to drive the output shaft and accessories. The mainframe, however, is the structural framework that supports and aligns the engine and its components. It doesn’t perform a distinct process like compression, combustion, or energy extraction, so it isn’t considered an engine module.

Understanding how the engine is built for a UH-60S helps you see why this item is not an engine module. The engine is organized into functional blocks: the cold section handles air intake and compression, the hot section contains the combustion process and the high-temperature pathway, and the power turbine section extracts energy from the hot gases to drive the output shaft and accessories. The mainframe, however, is the structural framework that supports and aligns the engine and its components. It doesn’t perform a distinct process like compression, combustion, or energy extraction, so it isn’t considered an engine module.