BBD-700 Hydraulics

Question 1

Which pumps supply normal hydraulic power to the Hydraulic system?

Answer 1

The three “A” pumps which operate continuously

Question 2

Which hydraulic systems are powered by engine driven pumps?

Answer 2

Systems 1 and 2

Pumps 1A and 2A

Question 3

What is normal hydraulic operating pressure?

Answer 3

3000 psi

Question 4

What type of hydraulic fluid is used in the Global Express?

Answer 4

SKYDROL LD-4 & HYJET IV-A

Question 5

What is the priority for ACMP pumps?

Answer 5

3A – 3B – 2B – 1B

Question 6

When the ACMP switch is set to AUTO, when will the pump start?

Answer 6

Either slats or flaps not IN/0° position

System low pressure detected

Question 7

How long will the “B” pumps operate once activate?

Answer 7

Minimum of 5 minutes

Question 8

What is normal hydraulic system 2 accumulator pressure?

Answer 8

500 psi

Question 9

How are the EDP HYD SOVs closed?

Answer 9

Selecting the HYD SOV switch “closed”

Pulling the fire DISCH handle

Question 10

What are the electrically driven pumps and associated AC buses?

Answer 10

1B – AC Bus 3
2B – AC Bus 2
3B – AC Bus 1
3A – AC Bus 4

Question 11

What hydraulic system is powered by the RAT?

Answer 11

System 3

Question 12

What is normal hydraulic system 3 RAT accumulator pressure?

Answer 12

1000 PSI

Question 13

What is normal hydraulic system 3 brake accumulator pressure?

Answer 13

500 psi

Question 14

How is hydraulic case drain fluid cooled prior to returning to the applicable reservoir?

Answer 14

Heat exchangers in the left and right wing fuel tanks.
Left wing – systems 1 and 3
Right wing – system 2

Question 15

What hydraulic pumps are available / operating during single generator operations (flight)?

Answer 15

Engine Pumps 1A and 2A

AC Pumps 3A and 3B