Which component supplies the drive gears for the starter/generator, N1 fuel control/pump and oil pump?

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

Answer: (A)

The drive gears for the starter, generator, fuel control/pump, and oil pump are housed in the accessory gearbox. This gearbox is powered by the engine’s core via an accessory drive shaft and contains a geared reduction system that delivers the right speed and torque to these essential helpers. Keeping these components on the accessory gearbox allows the engine to start, fuel the combustor, lubricate, and generate electricity without tying them into the main high-speed core path. The other options describe different parts of the propulsion system: a reduction gearbox lowers speed for applications like a propeller, the power turbine provides mechanical power to a load in turboprop configurations, and the gas generator is the core spool that produces energy but doesn’t organize these accessory drives.