Hydraulics and Fuel

Question 1

BTFANGS

Answer 1

Brakes
Thrust Reversers
Flaps
Airbrakes
Nosewheel Steering
Gear
Stick Pusher

Question 2

how is hydraulic power provided

Answer 2

variable volume, engine driven pumps
not “on demand”

Question 3

if one hydraulic pump fails what systems fail

Answer 3

none - either pump can operate all systems

Question 4

why is the hydraulic system pressurized

Answer 4

prevent foam and provide positive flow of fluid

Question 5

what operates the on-off hydraulic valve

Answer 5

HP Cocks

Question 6

HYD OVHT at what temperature

Answer 6

90C

Question 7

where to check hydraulic fluid level

Answer 7

aft equipment bay

Question 8

LO PRESS extinguishes at / starts at

Answer 8

1750 psi
1500 psi after 57 second delay

Question 9

normal hydraulic system pressure

Answer 9

3000 psi

Question 10

if there is no hydraulic pressure

Answer 10

pressure maintaining valve closes to try to provide 2300 psi for brake operation

Question 11

auxiliary hydraulic system

Answer 11

6 pint tank
hand pump in flight deck

Question 12

what does the auxiliary hydraulic system allow the hawker to do

Answer 12

lower landing gear
operate flaps
(enough to fully extend flaps and lower gear)

Question 13

how many tank sections are there

Answer 13

6 per wing

Question 14

boost pumps

Answer 14

if only one is operating it will only go to the side with the operating tank
takes 10 minutes with two pumps
18 minutes with one pump

Question 15

XFEED

Answer 15

opposite tank feeding engine

Question 16

TRANSFER

Answer 16

opens wing transfer valve and fuel will move to side with operating boost pump

Question 17

what are boost pumps powered by

Answer 17

PS

Question 18

what is the Emergency boost pump powered by

Answer 18

PE bus

Question 19

FUEL LO PRESS

Answer 19

fuel line below 7 psi

Question 20

Fuel Quantity

Answer 20

right MFD

Question 21

fuel limitations

Answer 21

fuel cannot be in the ventral tank unless wings each have 3450 lbs
ventral must be full or empty
500 lbs max imbalance
ventral tank must be transferred when each wing reduces to 3300 lbs
ventral tank must be empty for landing

Question 22

what are the hydraulic pumps

Answer 22

1 engine driven
aux
hand pump

Question 23

hydraulic pressurization

Answer 23

over pressure 4000 psi
normal pressure 3000 psi
trapped if pumps fail 2300psi
low pressure out 1750
low pressure on. 1500 psi (for 57 seconds)

Question 24

hydraulic accumulators

Answer 24

main 1000 psi
brake 1000 psi
thrust reverser 1500psi

Question 25

ponds of fuel is equal to what percent @ 6.7 lbs

Answer 25

15

Question 26

fuel pumps

Answer 26

jet pumps (4) boost pumps (2) engine driven (2)

Question 27

fuel jet pump description

Answer 27

**no moving parts** no electricity vacuum system use motive flow off boost pumps

Question 28

fuel boost pump description

Answer 28

can turn off / on only controllable pumps

Question 29

cons of engine driven pumps

Answer 29

if it fails, we fail provides pressure for fuel to get atomized

Question 30

where are the fuel annunciators

Answer 30

overhead panel above pump switches

Question 31

max fuel in order to transfer ventral fuel to wings

Answer 31

3300lbs

Question 32

minimum wing fuel with fuel in the ventral tank

Answer 32

3450lbs

Question 33

ventral tank quantity

Answer 33

1500 lb

Question 34

where is the fuel quantity read

Answer 34

right (copilot) mfd

Question 35

how long does fuel transfer take

Answer 35

10 minutes or 18 with single boost pump

Question 36

Boost pumps are located in the `

Answer 36

left and right wing tanks

Question 37

there are ____ water drains in the fuel system

Answer 37

five

Question 38

When the ventral tank contains fuel, a low Vmo speed warning will sound whenever aircraft speed exceeds

Answer 38

280 kts

Question 39

Total usable fuel capacity is

Answer 39

10,000lbs

Question 40

the maximum lateral imbalance permitted is

Answer 40

500lbs

Question 41

with both boost pumps inoperative:

Answer 41

ventral tank fuel cannot be transferred

Question 42

if the ventral tank is to be used in flight, it must be full, and each wing must contain

Answer 42

3450lbs fuel

Question 43

the aircraft fuel system accepts a maximum refueling supply pressure of

Answer 43

50psi

Question 44

when using the auxiliary system, landing gear should always occur before or after the operation of flaps

Answer 44

before

Question 45

pulling the AUX HYD SYSTEM lever

Answer 45

disengages balk arm, freeing hand pump for operation closes on-off valve to block main system pressure and connect landing gear actuators to the reservoir return landing gear handle no longer controls gear movement

Question 46

when can the hand pump action be stopped

Answer 46

once all three greens are on and positive resistance is felt to ensure landing gear is down and locked

Question 47

if one engine driven pump fails ( in relation to what the pressure indicator will show)

Answer 47

the hydraulic pressure indicator will display 3000psi and the applicable low pressure annunciator will illuminate

Question 48

if both engine driven pumps fail

Answer 48

indicated pressure is 2300 and both low pressure annunciators are illuminated

Question 49

the main hydraulic reservoir is pressurized to prevent

Answer 49

loss of wheel brakes

Question 50

the first step in operating the auxiliary hydraulic system is to

Answer 50

pull the AUX HYD SYSTEM lever

Question 51

the purpose of the pressure-maintaining valve in the main hydraulic system is

Answer 51

to maintain 2300 psi in the main accumulator for normal brake operation

Question 52

if one engine driven pump fails:

Answer 52

the remaining pump is capable of actuating all subsystems