Hydraulics

Question 1

Normal operating pressure?

Answer 1

3,000 psi

Question 2

Where are system 1 & 2 serviced?

Answer 2

Aft equipment bay

Question 3

How many pumps does each system have?

Answer 3

2:
Main pump A (EDP - 1A/2A)
Backup pump B (ACMP - 1B/2B 3A/3B)

Question 4

How many hydraulic systems?

Answer 4

3

Question 5

Which of the 3 is the largest?

Answer 5

3

Question 6

Which of the 3 is the smallest?

Answer 6

1

Question 7

System 1 powers:

Answer 7

(Refer to picture)

RUDDER
ELEVATOR
L AIL
OB SPLRON
OB FLT SPLRS
OB GND SPLRS
L REVERSER

Question 8

System 2 powers:

Answer 8

Refer to picture)

RUDDER
ELEVATOR
AIL R
IB SPLRON
IB FLT SPLRS
IB GND SPLRS
LG ALT EXT
OUTBD BRAKES
REVERSER R

Question 9

1A/2A are running when:

Answer 9

The associated engine is running

Question 10

Do 1B/2B auto start after engine/EDP failure?

Answer 10

No

Question 11

System 1 & 2 cooling cooled by:

Answer 11

Cooled by common air/oil heat exchanger in aft equipment bay (air from ram air scoop moves across heat exchanger)

Question 12

What 2 switchlights close the Hydraulic Shutoff Valve?

Answer 12

HYD SOV

ENG FIRE PUSH

Question 13

How are 3A/3B actuated?

Answer 13

Electrically

Question 14

How often does 3A normally run?

Answer 14

Continuously

Question 15

System 3 is serviced where?

Answer 15

Ground service panel, right side of fuselage, aft of wing root

Question 16

When does 3B normally run?

Answer 16

During periods of high-flow requirement

Question 17

Which pump is automatically powered during AC power failure?

Answer 17

3B

Question 18

What do the hydraulic systems power?

Answer 18

• rudder
• elevators
• ailerons
• multifunction spoilers
• ground spoilers
• thrust reversers
• wheel brakes
• nosewheel steering
• landing gear

Question 19

What kind of hydraulic fluid?

Answer 19

Skydrol

Question 20

Main pumps (A) meet needs of:

Answer 20

Normal flight controls

Question 21

Auto Mode causes 1B/2B to operate when:

Answer 21

• their respective bus is powered
• any generator operating
• flaps not at 0

Question 22

During Manual Mode, 1B/2B operate when:

Answer 22

• their respective bus is powered

- any generator is operating

Question 23

Where is hydraulic info displayed?

Answer 23

Hydraulic Synoptic Page

Question 24

How many reservoirs/accumulators?

Answer 24

1 per system

Question 25

System 3 powers:

Answer 25

Rudder & Elevator
L & R Ailerons
IB GND SPLRS
LDG GEAR
NW STEERING
INBD BRAKES

Question 26

Does system 3 use a heat exchanger?

Answer 26

No

Question 27

Does 3B auto start after 3A failure?

Answer 27

No

Question 28

3B Auto Mode: Activated when:

Answer 28

• Associated bus is powered

- Flaps not at 0

Question 29

Are there any flight deck controls for EDP1/2?

Answer 29

No

Question 30

Reservoir quantity?

Answer 30

45-85%

Question 31

Low pressure?

Answer 31

<1800 psi

Question 32

High pressure?

Answer 32

3200 psi

Question 33

Pressure relief occurs at:

Answer 33

3750 psi

Question 34

High temp?

Answer 34

> = 96 C

Question 35

How many accumulators?

Answer 35

5 (1 for each system, 1 for each brake system)

Question 36

What color is the hydraulic fluid?

Answer 36

Purple

Question 37

How many systems actuate the elevator, rudder, & ailerons?

Answer 37

All 3

Question 38

Stab trim rates & priority:

Answer 38

CA: .5 deg/sec
FO: .5 deg/sec
AP: .5 deg/sec (flaps in motion)
       .1 deg/sec (flaps stationary)
Mach trim: .03-.06 deg/sec

Question 39

System 3 powers:

Answer 39

(Refer to picture)

RUDDER
ELEVATOR
L AIL R
IB GND SPLRS
LDG GEAR
N/W STEER