Hydraulics

Question 1

If the primary hydraulic system fails, what is the effect, if any, on the flight control system?

Answer 1

Loss of the Flight Management Computer (FMC) and Backup Control System (BUCS) inputs

Question 2

Where are the primary hydraulic system dirty filter indicators located?

Answer 2

On the primary manifold

Question 3

Which components/systems lose hydraulic power in the event the utility reservoir is low?

Answer 3

1. The ammunition carrier drive motor
2. AWS elevation actuator and azimuth drive motor
3. Pylon actuators
4. Tail wheel unlock actuator
5. The utility side of the tail rotor servo

Question 4

During preflight, the utility accumulator pressure gauge should indicate a minimum of ____psi prior to attempting an auxiliary power unit (APU) start

Answer 4

2600

Question 5

During preflight, what pressure should the utility hydraulic return actuator gauge indicate?

Answer 5

55 psi

Question 6

What is purpose of the hand pump?

Answer 6

Charge the utility hydraulic accumulator and fill the primary and utility hydraulic reservoirs

Question 7

What is the crew station indication when the tail wheel is unlocked?

Answer 7

UNLOCK indicator is illuminated

Question 8

When is the hydraulic pressure displayed on the ENG page flight format?

Answer 8

When it is out of normal limits

Question 9

What does the caution UTIL HYD BYP indicate?

Answer 9

Utility return system indicates a “dirty filter” impending bypass condition

Question 10

What is the time limit for either hydraulic system operating in the transient (>3410 psi) range?

Answer 10

5 seconds