Which component drives the hydraulic pumps?

• A. Tail rotor drive
• B. Engine
• C. Main transmission
• D. Hydraulic reservoir

Answer: (C)

Hydraulic pumps in this setup are powered through the main transmission via an accessory drive. The main transmission acts as the central power hub, taking engine power and distributing it to various systems, including the hydraulic pumps. This arrangement provides a reliable mechanical source to pressurize the hydraulic fluid for flight-control help, tied to the rotor/engine system.

The tail rotor drive is a separate path that powers the tail rotor, not the hydraulic pumps, and the hydraulic reservoir is simply the fluid storage, not the source of drive.