What kind of hydraulic system does the T-6B use?

• A. An engine-driven, fluid pressurized system charged to 3000 +/- 120 psi
• B. An electrically operated system charged to 2400 +/- 50 psi
• C. An engine-driven, fluid pressurized system charged to 3000 +/- 150 psi
• D. An electrically operated, hydraulically controlled system charged to 3500 +/- 225 psi

Answer: (A)

The T-6B uses engine-driven hydraulic power with high-pressure fluid. The system is driven by the engine and pressurizes hydraulic fluid to about 3000 psi, with an allowable variation of roughly ±120 psi. This setup provides reliable, high-pressure actuation for flight controls and related systems without relying on electric power.

The other descriptions don’t fit because they describe alternative power sources or different pressure specifications. An electrically powered system would change the power source and architecture, and pressures or tolerances like 2400 psi or 3500 psi (with larger tolerance) aren’t the standard for this aircraft’s hydraulic system.