Hydraulic - 747

Question 0

How are hyd res pressurized?

Answer 0

Bleed air sys

Question 1

Aux pump powered by?

Answer 1

AC via the gnd handling bus

Question 2

Res RF means

Answer 2

Refill required

Question 3

LO means ?

Answer 3

Qty goes below pre-determined value

Question 4

Normal psi?

Answer 4

3000, will display amber if psi is low

Question 5

Where is hyd qty indicated?

Answer 5

Status and hyd synoptic page

Question 6

Hyd qty, psi, temp are shown on?

Answer 6

EICAS status display

Hyd synoptic display

Question 7

Normal pump config

Answer 7

EDP’s are ON
Demand pumps 1,2,3 are in auto
Demand pump 4 is in AUX

Question 8

Parking procedure

Answer 8

Demand 1,2,3 are OFF
Demand # 4 in AUX
When chocks are in, release pkg brk, and select #4 AUX to OFF.

If pkg brk remains set, #4 aux may be selected off after 30 sec. Continuous operation may affect wear.

Question 9

System fault light

Answer 9

Low sys psi
Low res qty
Excessive fluid temp

Question 10

Low psi light for each demand pump?

Answer 10

Yes, and will illuminate amber if sw is in OFF position.

Question 11

Demand pump #4 sys fault light/ Press illuminated. Solution?

Answer 11

On the gnd, with gnd handling bus powered, and #4 eng shutdown, selecting demand pump 4 to aux will extinguish the sys fault light but press will remain illuminated.

Question 12

Demand pump low psi light indicates either ( selector is in auto)

Answer 12

Pump operates but pressure is low

Pump is inoperative