T-6 Hydraulic system 1 SY110

Question 1

How are most hydraulics pressurized?

Answer 1

fluids/gas.

Question 2

What is the pressure of the hydraulics system of the T-6?

Answer 2

3000 +/- 120 pounds per square inch

Question 3

How does a basic hydraulic system work?

Answer 3

A pump produces hydraulic pump which is in the system until an electrical selector valve is opened, releasing the pressure to operate and actuator. Then the actuator then uses mechanical force to move the desired aircraft component.

Question 4

The primary hydraulic system operates what during normal flight?

Answer 4

Landing gear and main landing gear inboard doors, flaps, speed brake, and nose wheel steering

Question 5

Where is the hydraulic systems/fluids located?

Answer 5

Right side of aircraft behind trailing edge of wing root.

Question 6

When should notify maintenance about the hydraulic fluids?

Answer 6

When the system for the FULL (AC) or FULL (AD) is out of the green range.

Question 7

How much PSI do you need to use the hydraulics?

Answer 7

1800 PSI

Question 8

Where is the hydraulic pump located?

Answer 8

In the engine compartment driven by the accessory gear box

Question 9

What does the reservoir do?

Answer 9

provides pressurized fluid back to the pump to keep it charged with fluid

Question 10

What is the pressure of the power package pressure release valve and what does it do?

Answer 10

3250-3500 PSI, prevents possible hydraulic overpressure

Question 11

What does the slide valve do in the power package?

Answer 11

Isolates the hydraulic pressure coming from the engine-driven pump, when the emergency system is activated, it then isolates the main system, but the pump can no longer recharge the system.

Question 12

True/False: You go back to the main hydraulics after activating emergency gear.

Answer 12

False

Question 13

What does the selector manifold do?

Answer 13

located in the hydraulic service bay, it allows the hydraulic system, cockpit controls, and aircraft devices to work together

Question 14

What does the selector valve do?

Answer 14

Connects to an actuator that physically moves the landing hear, main inboard doors, flaps, or speed brake

Question 15

What happens when the hydraulic fluid level goes under 1 quart?

Answer 15

the amber HYDR FL LO light comes on

Question 16

When will the emergency system be used?

Answer 16

Primary hydraulic failure, engine failure, or battery bus failure

Question 17

What does the emergency system control?

Answer 17

the landing gear and main inboard doors, and the flaps.

Question 18

True/Flase: Gear/flap can be retracted with the emergency hydraulics?

Answer 18

False

Question 19

What type of gas does the emergency system use for pressurization

Answer 19

Helium

Question 20

What does the T handle do?

Answer 20

It allows for manual reduction of pressure in the emergency accumulator by maintenance

Question 21

What does the pressure release valve do?

Answer 21

It operates automatically to release excessive pressure if reaches 3500 psi

Question 22

Whats does the check valve do?

Answer 22

prevents backflow from the emergency system to the main system

Question 23

What happen when the emergency accumulator drops below 2400 +/- 150?

Answer 23

The amber EHYD PX LO light comes on

Question 24

Main parts of the nose gear?

Answer 24

the spring strut, nose leg actuator, and nose gear door. Modified aircraft have a nose gear friction collar

Question 25

How long does it take for the gear to extended/retracted?

Answer 25

6 seconds