Hydraulics

Question 1

Will the Hydraulic System work when you are in EMERGENCY?

Answer 1

No the Hydraulic system does not function normally in Emergency mode. Because the engine driven hydraulic pumps are the primary source of hydraulic pressure.

Question 2

How does the Hydraulic System create pressure?

Answer 2

1. With engine driven hydraulic pumps
2. Enables system to build pressure to 1500psi.
3. As pressure builds through approx 125-145 Psi a pressure switch illuminates HYD PRESS ON annunciator.

Question 3

How do you know if an Hydraulic Pump is failed?

Answer 3

HYD FLOW LOW left or right hand light ON

(Indicates inoperative left or right hydraulic pump.

Question 4

When does the HYD Low level annunciator illuminate?

Answer 4

When the fluid drops below the REFILL (0.2g) position

Question 5

What does a HYD PRESS ON annunciator indicate if you are not using the hydraulic system?

Answer 5

Indicates that the hydraulic system is pressurised, even though you are not actively using hydraulic components like flaps, landing gear, speed brakes or brakes.

Question 6

How would you correct a HYD PRESS ON annunciator indication if you’re not using the Hydraulic system?

Answer 6

Pull the circuit breaker.

Question 7

When will the POWER BRAKE LOW PRESS annunciator illuminate ?

Answer 7

If the pump pressure switch detects less than 750 psi.
Will also illuminate the “Anti Skid INOP” Annunciator.

Question 8

When does the HYD PRESS ON annunciator light illuminate?

Answer 8

When pressure builds up thru approx 125-145 psi.

Question 9

With the loss of DC power, the system bypass valve fails to the open position True or False?

Answer 9

True.