Hydraulics

Question 1

Where is the HYD1 system routed?

Answer 1

Primarily along the right side of the fuselage,

main landing gear Bay

wing leading edge

Question 2

Where is the hyd 2 system routed?

Answer 2

Left side of the fuselage

Rear wing spars

Question 3

What does the Hyd 1 system power?

Answer 3

Aileron, rudder &

tailplane PFCU, Q feel system (yaw damper switch on)

And when PSI is 1500 +- 100 or more
Gears, flaps, wheel brakes, speed brake

Question 4

What does the hyd2 system power?

Answer 4

Aileron and tailplane PFCU only

Question 5

Each Hyd system consist of?

Answer 5

Low pressure nitrogen charge reservoir

Engine driven Hyd pump

Flying control accumulator

Question 6

Hyd 1 gauge

Red
Amber
Green

Answer 6

Red: 0 - 653
Amber: 653 - 1600
Green: 2755 - 3045

Question 7

Hyd 2 gauge

Red
amber
Green

Answer 7

Red: 0 - 1600
Amber: 2400 - 2755
Green: 2755-3045

Question 8

Purpose of the flying control accumulator

Answer 8

Provide instant response during period of high demand

Ensure smooth supply by damping fluctuation

Short term emergency response following sys failure

Question 9

Hyd 2 system has an addition RAT accumulator which…

Answer 9

Powers RAT to raise when Hyd 2 fail

Maintain pressure to PFCU while rat builds pressure

Provide smooth pressurized fluid during operation of emer Hyd system

Question 10

When is Hyd 2 deactivated and when can Hyd 2 be reset?

Answer 10

If engine falls below 42% Hyd 2 drops off

When engine rpm rises to 45%, the Hyd 2 reset button can be pressed. (As much as 76% may be required to retract the RAT)

Question 11

When does the RAT extend?

Answer 11

When hyd 2 falls below 1500 +- 100PSI

Question 12

Rat output PSI

Answer 12

2400 - 3000psi

Question 13

Amber Hyd 1 or 2 caution comes on when psi is

Answer 13

Output of hydraulic pump is 1230 +- 110 psi

Question 14

Rat operating airspeed

Answer 14

Hyd EP: 130kts
Gliding: 115kts
Test: 105kts