Hydraulics

Question 1

What systems use hydraulic power?

Answer 1

Flight controls
Spoilers
Landing Gear
Nose wheel steering
Wheel brakes
Thrust levers

Question 2

Can hydraulic fluid be transferred between each system?

Answer 2

No

Question 3

How many hydraulic pumps are on the airplane?

Answer 3

6 total
2 EDPs
4 ACMPs

Question 4

What are the basic components of the hydraulic systems?

Answer 4

Reservoir

Pumps

Accumulator

Question 5

What do accumulators do?

Answer 5

Shock absorption

Fluid storage

Question 6

Oral

What does the flow limiter valve do?

Answer 6

Assist in helping the RAT spin up to speed helping pump 3A….

After RAT is up to speed the pump unlimiter valve closes

The flow limiter valve stays on, the RAT powers 3A

Question 7

Oral

When does pump 2B come on automatically?

Answer 7

After engine 1 start and releasing the parking break.

Question 8

When will ACMP 1 or 2 automatically activate?

Answer 8

Ground – flaps >0

         - - TL set to T/O, or
         - - Groundspeed > 50 kts 

Flight. – engine failure or EDP failure
– Flaps >0

Question 9

What are some important items controlled by HYD 2 system?

Answer 9

Landing gear ……

Question 10

How many hydraulic systems are on the airplane?

Answer 10

3 independent systems

HYD 1, HYD 2, and HYD 3

Question 11

What’s the most important thing on hydraulic system 2?

Answer 11

Nose wheel steering and

Landing gear

Question 12

When does the PTU actually start running?

Answer 12

When you actually select gear down lever

Question 13

Are there any other accumulators?

Answer 13

Each Hydraulic system has an accumulator

Brakes have an accumulator

Question 14

Where are the hydraulic pumps connected???

Answer 14

Accessory gear box??