Hydraulic Power Systems

Question 1

Normal hydraulic system pressure with the engine-driven pumps operating is:

Answer 1

1,550 +/- 25 psi

Question 2

The hydraulic shut off valves are closed:

Answer 2

By pulling the engine FIRE handles

Question 3

In the event of hydraulic system pressure failure in flight:

Answer 3

Refer to the Hydraulic System Failure/Alternate Gear Extension checklist

Question 4

In the event of hydraulic system failure, the LOW HYD light will illuminate at:

Answer 4

1,125 psi

Question 5

During a hydraulic system failure, DO NOT operate the following subsystem using the auxiliary hydraulic pump:

Answer 5

Landing gear

Question 6

The approved fluid for the hydraulic system is:

Answer 6

MIL-H-5606

Question 7

The operational time limit of the auxiliary pump is:

Answer 7

3 minutes on, 20 minutes off

Question 8

The auxiliary hydraulic pump will provide approximately:

Answer 8

1,250 psi

Question 9

If DC electrical power is applied to the aircraft and residual hydraulic pressure is 1,450 psi:

Answer 9

• The auxiliary hydraulic pump will not operate when the HYD PUMP switch is on
• The LOW HYD light will be out
• 1,450 psi will be shown on the HYDRAULIC PRESSURE indicator