Hydraulics

Question 1

What systems does the hydraulic system provide hydraulic pressure to?

Answer 1

Landing gear, flaps, speed brake, power brakes

Question 2

How is the landing gear system controlled and operated?

Answer 2

electrically controlled, hydraulically operated

Question 3

What are the primary flight controls?

Answer 3

Rudder, elevator, spoilers

Question 4

What are the secondary flight controls?

Answer 4

Speed brakes, flaps, trim system

Question 5

What does lowering the landing gear handle do?

Answer 5

Sends an electrical signal to initiate gear extension

Question 6

Where are the brake pedals located?

Answer 6

The upper portion of both the pilot’s and copilot’s rudder pedals

Question 7

What is used to pressurize the hydraulic reservoir?

Answer 7

Filtered bleed air (15 psi) from the engines

Question 8

What does bleed air from the engines do for the hydraulic reservoir?

Answer 8

Prevents fluid from foaming and also ensures a constant supply of hydraulic fluid to the pumps

Question 9

When does the HYD LEVEL LO annunciator illuminate?

Answer 9

When the fluid level in the reservoir drops to 0.6 gallons or less

Question 10

What is normal operating pressure of the hydraulic pump

Answer 10

1500 psi

Question 11

What drives the engine driven hydraulic pumps?

Answer 11

Accessory gearbox

Question 12

What are the flow rates of the engine driven hydraulic pumps?

Answer 12

0 to 3.9 gallons per minute for each pump

Question 13

When does the L or R H PRESS LO annunciator illuminate?

Answer 13

If pump pressure falls below 750 psi

Question 14

What happens if a filter becomes clogged?

Answer 14

Hydraulic fluid bypasses these filters at 50 psi

Question 15

When does the pressure relieve valve open automatically?

Answer 15

If the system pressure exceeds 1650 psi

Question 16

When must the crew manually intervene by opening the bypass valve in the hydraulic system?

Answer 16

1850 psi

Question 17

What is the normal hydraulic system range?

Answer 17

1350-1550 psi

Question 18

When full, how much fluid does the hydraulic reservoir contain?

Answer 18

1.1 gallons

Question 19

Where are the shutoff valves located?

Answer 19

Between the reservoir and pumps

Question 20

What switch controls the shutoff valves?

Answer 20

Position switchlights on the shroud panel- L or R H/V OPEN/CLOSE

Question 21

The flow of hydraulic fluid from the reservoir to a pump can be stopped by closing what valve?

Answer 21

Shutoff valve

Question 22

The hydraulic valve package consists of valve assemblies for which three systems?

Answer 22

Landing gear, flaps, speed brake

Question 23

The system relief valve starts to open at what psi?

Answer 23

1650 psi

Question 24

At what pressure does the hydraulic system redline?

Answer 24

1850 psi

Question 25

When does a red UNLOCKED gear indicator light illuminate?

Answer 25

- landing gear is in transit - 1 or more gear is not down and locked - the main gear fuselage doors are not closed and locked

Question 26

When does the landing gear warning horn sound?

Answer 26

- Flaps are at 0- or 10-deg position and either throttle is at 70% N2 (or below) - Flaps are extended beyond the 10-degree position (regardless of throttle position)

Question 27

What is the purpose of the shimmy damper?

Answer 27

Installed on the nose gear and acts to dampen vibrations, especially during high-speed ground operations (like T/O and landing roll)

Question 28

How are the inboard main gear doors held in position?

Answer 28

Mechanically

Question 29

How long does gear extention/retraction take?

Answer 29

approximately 7 seconds

Question 30

How long does the emergency gear extention take?

Answer 30

30 seconds

Question 31

How long does it take to close the main inboard gear doors using the emergency nitrogen system?

Answer 31

3 seconds

Question 32

What is the landing gear limiting speed?

Answer 32

200 KIAS

Question 33

What is the emergency landing gear extention speed?

Answer 33

150 KIAS

Question 34

What are the limits for the nitrogen storage bottle?

Answer 34

1350-1650 psi

Question 35

What is the normal strut extension for the nose gear?

Answer 35

3.5 inches

Question 36

What is the minimum strut extension for the main gear?

Answer 36

1.1 inches

Question 37

During normal operation, the T-1A landing gear are _________ controlled and _____ operated.

Answer 37

electrically controlled and hydraulically operated

Question 38

Where is the landing gear HORN CUT button (used to silence the landing gear warning tone) located?

Answer 38

on the outboard grip of both control yokes

Question 39

What is used to raise the landing gear if the landing gear downlock release level fails to release in flight?

Answer 39

Downlock release button

Question 40

When turning the aircraft on the ground, you can cause the nose wheel to caster beyond 25 degress (up to _____ deg) by applying rudder, differential power, and differential braking.

Answer 40

45 degrees

Question 41

During the gear extension sequence, when does the main landing gear lower?

Answer 41

After the inboard gear doors are fully open

Question 42

How are the uplock assembles released during emergency gear extension?

Answer 42

Mechanically

Question 43

What is the maximum allowable altitude for inflight gear extension?

Answer 43

20000 feet MSL

Question 44

What must be true for the anti-skid system to operate?

Answer 44

The power brake system must be functional and the anti-skid control switch must be in the ON position

Question 45

What does a transducer do?

Answer 45

Electrically sense a change in wheel rotation speed and provides data to anti-skid control box

Question 46

Locked wheel protection is available above what tire speed?

Answer 46

14 knots

Question 47

What three positions does the anti-skid control switch have?

Answer 47

ON, OFF, TEST

Question 48

At what temperature will the thermal fuse plugs located in the wheels soften and blow out?

Answer 48

430 deg F

Question 49

At what brake energy will the thermal fuse plus blow out?

Answer 49

8.1 million ft-lbs

Question 50

When should you assume you have hot brakes?

Answer 50

Any braking effort between 8.1 and 14.8 million foot-lbs

Question 51

How long does it take for the max temperature to reach the outer surface?

Answer 51

15 minutes

Question 52

What is the purpose of the brake accumulator?

Answer 52

Dampen pressure fluctuations from the hydraulic system

Question 53

Which component of the brake system permits braking from either pilot position?

Answer 53

Mixing valves

Question 54

If normal hydraulic pressure is not available to the power brake anti-skid control valve, the brake system automatically reverts to what mode?

Answer 54

Manual

Question 55

Parking brakes prevent aircraft movement by what?

Answer 55

Trapping hydraulic pressure

Question 56

When does the ANTISKID FAIL light illuminate?

Answer 56

Landing gear extended, anti-skid control switch ON, and loss of electrical power to the anti-skid control valve or the control box gear is extended and anti-skid control switch is in the OFF position dump command is received for an extended period of time

Question 57

The amount of energy absorbed when stopping the T-1A is a factor of what variable?

Answer 57

Ambient temperature, pressure alititude, aircraft weight, speed at which brakes are applied, headwind/tailwind componenet

Question 58

When will brake damage and failure occur?

Answer 58

14.8 million ft-lbs of brake energy are absorbed

Question 59

What are the indications of hydraulic pump pressure low?

Answer 59

L or R H PMP PRESS LO annunciator illuminates along with MASTER CAUTION RESET (hydraulic pressure on gauge should be normal)

Question 60

What are the indications of high hydraulic pressure?

Answer 60

the only indication is on the hydraulic gauge iteself

Question 61

What does moving the hydraulic pressure bypass switch to the REL position do?

Answer 61

Opens the bypass valve, diverting all hydraulic fluid back to the reservoir and dumping system pressure and essentially forcing hydraulic system failure

Question 62

What are the indications of low hydraulic pressure?

Answer 62

Pressure gauge reads below 1350 psi, possibly H PMP PRESS LO and HYD LEVEL LO

Question 63

If all hydraulic pressure is lost, which systems will you lose?

Answer 63

Normal gear extension, flaps( if extended, they will remain in that position), speed brake (if extended, will blow down), power brakes and antiskid

Question 64

In the event of loss of total hydraulic pressure, what should you do?

Answer 64

Emergency gear extension, no-flap landing, expect landing distance to increase 90% over computed 30-flap landing distance, consider reducing ross weight to lower approach and landing speeds

Question 65

If a tire failure occurs prior to S1, should you abort the T/O?

Answer 65

Yes

Question 66

If you a tire failure occurs after T/O what should you do?

Answer 66

Do not change configuration

Question 67

What is the maximum rudder deflection?

Answer 67

30 degrees each side)

Question 68

What is the max elevator deflection?

Answer 68

12 degrees down, 25 degrees up

Question 69

How does the aft flap move?

Answer 69

mechanical linkage

Question 70

What is the max airspeed to extend the flaps past 10 deg?

Answer 70

170 KIAS

Question 71

What is the max airspeed to fly with the flaps past 10 deg?

Answer 71

165 KIAS

Question 72

What is the max airspeed to extend the flaps to 10 deg?

Answer 72

200 kias

Question 73

What is the max airspeed to fly with the flaps at 10 deg?

Answer 73

200 kias

Question 74

G limits with flaps up?

Answer 74

-1.0 to 3.2 G's

Question 75

G limits with flaps extended?

Answer 75

0 to 2.0 G's

Question 76

What conditions must be met for the speed brakes to extend?

Answer 76

both throttle below NORM T.O position, flaps not extended beyond 10 degrees