Which of the following is NOT a Power Turbine Component?

• A. Stage 1 Nozzle
• B. turbine Case
• C. Power Turbine Rotor Assembly
• D. Exhaust Frame

Answer: (A)

The main idea is distinguishing which parts belong to the power turbine versus the gas generator side. The power turbine components are the pieces that directly convert the hot gas energy into shaft power: the power turbine rotor assembly, the turbine casing, and the exhaust frame. The stage 1 nozzle, however, belongs to the gas generator side; it’s part of the nozzle assembly that directs and conditions the gases entering the gas generator’s turbine stages. It isn’t part of the hardware that extracts energy in the power turbine, so it isn’t a Power Turbine Component. In short, the nozzle shapes the flow for the gas generator, while the listed items are structural and rotating parts of the power turbine.