The forward supporting structure of the engine is associated with which subsystem?

• A. Gas Generator
• B. Power Turbine
• C. Reduction Gearbox
• D. Accessory Gearbox

Answer: (D)

The thing being tested is where the engine’s accessory drive system sits and what it supports on the forward part of the engine. The subsystem that is physically mounted to the forward supporting structure and provides power to the engine’s external equipment is the Accessory Gearbox. It’s driven by the gas generator and powers pumps, generators, and other accessories, while also serving as a mounting point to the airframe for engine support. The other options refer to core rotating sections or a drive component, not to the forward-mounted accessory system itself.