Hydraulic

Question 1

What is the capacity of the main system reservoir?

Answer 1

2.4 US GAL

Question 2

What type of fluid is used?

Answer 2

MIL-H-5606C

Question 3

What pressurizes the hydraulic reservoir system?

Answer 3

Engine bleed air

Question 4

What does a HYD OVHT annunciator indicate?

Answer 4

Fluid temperatures in excess of 90C

Question 5

What does a HYD # LO PRESS annunciator indicate?

Answer 5

Main supply low pressure warning, <= 1500 PSI

Question 6

What does an EMERG BRK LO PRESS annunciator indicate?

Answer 6

Emergency brakes low pressure warning. Pressure <= 2250 PSI

Question 7

What is the power source of the hydraulic pressure indicator?

Answer 7

DC electric

Question 8

What happens to the hydraulic pressure indicator if DC electric power is lost?

Answer 8

Indicator shows OFF

Question 9

What position must the airbrakes be in IOT properly sight the fluid level gauge?

Answer 9

Airbrakes must be shut

Question 10

What pressure should the HYD TANK pressure gauge show?

Answer 10

15 PSI

Question 11

When starting the engines, at what point will the HYD # LO PRESS annunciator extinguish?

Answer 11

1750 PSI

Question 12

What pressure should the system stabilize at?

Answer 12

3000 PSI

Question 13

How long is the delay before the low pressure switch activates a low pressure annunciation?

Answer 13

57 seconds?

Question 14

What can cause both low pressure annunciators to illuminate?

Answer 14

If both pumps fail or if system fluid is lost

Question 15

What pressure should the pressure indicator show if both pumps fail or if system fluid is lost?

Answer 15

2300 PSI

Question 16

Why will the pressure indicator show 2300 PSI in the event of system fluid loss or a dual pump failure?

Answer 16

The pressure-maintaining valve has closed, trapping pressure in the main accumulator for normal brake operation

Question 17

In the event of a dual pump failure or system fluid loss, what system should be available?

Answer 17

Normal brakes

Question 18

In the event of a dual pump failure or system fluid loss, what systems can be operated by the AUX hydraulic system?

Answer 18

Landing gear and flaps

Question 19

Is there any indication for system fluid loss?

Answer 19

No

Question 20

How can system fluid loss from a subsystem be detected?

Answer 20

An abnormal drop in pressure as that subsystem is activated

Question 21

Can flight be continued in the event of a HYD OVHT indication?

Answer 21

Yes, however fault must be corrected prior to the next flight

Question 22

How is the AUX hydraulic system pressurized?

Answer 22

The hand pump

Question 23

What is the capacity and location of the AUX hydraulic tank?

Answer 23

6 pints, located in the nose gear bay

Question 24

What AUX hydraulic fluid level reduction will result in an AUX HYD LO LEVEL annunciation?

Answer 24

> = .5 pints

Question 25

Is lowering of the landing gear available via the AUX HYD system if the landing hear position handle is in the up position?

Answer 25

Yes

Question 26

What must you do first in order to lower the flaps via the AUX HYD system?

Answer 26

Place the flap position lever in the appropriate position

Question 27

When using the AUX HYD system, what system is always actuated first?

Answer 27

The landing gear

Question 28

Can the AUX HYD system be used to retract the landing gear?

Answer 28

No

Question 29

What operations should the AUX HYD reservoir provide sufficient fluid to conduct?

Answer 29

Lowering the landing gear, lowering then retracting the flaps

Question 30

CAUTION: If the AUX HYD system selection has been made following a main system failure, can you reset the AUX system in flight?

Answer 30

No

Question 31

CAUTION: What can reseting the AUX HYD system after failure of the main HYD system result in?

Answer 31

Collapsing of the landing gear

Question 32

What does pulling the AUX HYD SYSTEM lever do?

Answer 32

Releases the balk arm, freeing the hand pump Closes the on-off valve, allowing hand pump pressure buildup Positions the dump valve to block main system pressure and to connect main landing gear actuators to the reservoir return Landing gear handle no longer controls gear movement

Question 33

CAUTION: When lowering the main landing gear via the AUX HYD SYSTEM, how long must pump action be continued?

Answer 33

Until three greens are achieved AND positive resistance is felt to ensure gear is down and locked

Question 34

What are the seven hydraulic subsystems

Answer 34

``` Landing gear Flaps Airbrakes Nosewheel steering Brakes Stick pusher Thrust reversers ```

Question 35

What five hydraulic annunciators are powered by the PE bus bar?

Answer 35

``` HYD 1 LO PRESS HYD 2 LO PRESS AUX HYD LOW LEVEL EMER BRAKE LOW PRESSURE HYD OVHT ```

Question 36

What hydraulic electric indicator(s) are powered by the PS2 bus bar?

Answer 36

Main SUPPLY pressure indicator