EMB120 Hydraulics System

Question 1

How many hydraulic systems does the aircraft have?

Answer 1

2, Green and Blue

Question 2

Are the systems interconnected?

Answer 2

No they are separate systems and power individual items

Question 3

Does the gear have redundancies in the hydraulic system?

Answer 3

No

Question 4

Does the flaps and the breaks have redundancies?

Answer 4

Yes the, green system powers the outboard breaks and the outboard flaps, the blue system powers the inboard breaks and the inboard flaps

Question 5

What is used to keep positive pressure in the hydraulic reservoir?

Answer 5

Bleed air from P3

Question 6

How many filters does the system have? How many are monitored?

Answer 6

4 filters and 3 are monitored

Question 7

What hydraulic pumps does the aircraft have? Where are they?

Answer 7

Engine Driven and Electric
Mechanical and electrical
RGB and hydraulic panel

Question 8

What is powered by the Green system?

Answer 8

Nose steering 
Main Door
Landing Gear 
Rudder 1
Outboard Flaps 
Outboard Breaks

Question 9

What is powered by the Blue system?

Answer 9

Emergency/Parking Break 
Rudder 2 
Inboard breaks 
Inboard flaps
Nac flaps

Question 10

What PSI are we looking for in the hydraulic system?

Answer 10

Green line or 3000psi

Question 11

How do can you shut off the hydraulic System

Answer 11

Pulling the T-handle

Question 12

How may check valves are there

Answer 12

5

Question 13

How many times can the door be opened with no hydraulics on

Answer 13

4 complete operations

Question 14

What is the capacity of the E/Parking break?

Answer 14

8-10 complete actuations

Question 15

When does the hydraulic low pressure light turn on?

Answer 15

1500psi

Question 16

What hydraulic filters are monitor?

Answer 16

High pressure filters x2
Return filter

Backup return filter non monitored