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Republic E170 > Hydraulic > Flashcards

Flashcards in Hydraulic Deck (34)
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1
Q

Hydraulic system provide power for:

A
  • flight controls
  • spoilers
  • landing gear
  • nose wheel steering
  • wheel brakes
  • thrust reversers
2
Q

Normal hydraulic pressure

A

3,000 psig

3
Q

Hydraulic System 1 is comprised of:

A
  • one reservoir
  • one engine driven pump (EDP 1)
  • one electric pump
  • one accumulator
4
Q

Hyd system 1 powers

A
  1. elevator (left hand outboard)
  2. rudder (upper)
  3. thrust reverser (engine 1)
  4. multi function spoilers (l and r panels 3 and 4)
  5. ground spoilers (l and r panel 2)
  6. outboard brakes
  7. emergency parking brake
5
Q

What does the hydraulic accumulator do?

A

helps maintain constant pressure by covering transient demands during normal operation and keeping residual pressure to avoid pump cavitation

6
Q

Hydraulic System 2 is comprised of:

A
  • one reservoir
  • one engine driven pump (EDP 2)
  • one electric pump
  • one accumulator
  • PTU
7
Q

Hyd system 2 powers

A
  1. elevator (left and right inboard)
  2. ailerons (right and left inboard)
  3. thrust reverser (engine 2)
  4. multi function spoilers (l and r panel 5)
  5. ground spoilers (l and r panel 1)
  6. inboard brakes
  7. nose wheel steering
  8. landing gear
  9. emergency parking brake
8
Q

How are the engine driven pumps powered

A

engine accessory gear box

9
Q

In flight the electric pump 1 and 2 activates automatically when:

A
  • EDP or engine fail or
  • flaps selected greater than 0
  • during landing for 60 seconds to avoid abrupt hyd pressure variations in the event of engine failure
10
Q

On ground the electric pump 1 and 2 activates automatically when:

A
  • flaps greater than 0 and
  • thrust levers set to takeoff thrust or
  • groundspeed greater than 50 its
  • during takeoff w/ thrust levers at TOGA for 60 seconds to avoid abrupt pressure variations in the event of engine failure
11
Q

On the ground electric pump 2 automatically activates when

A
  • engine 1 running and parking brake released
  • engine 1 running and flaps greater than 0
  • during engine 1 start if parking brake has been applied at least 6 mins before
12
Q

What is the purpose of the PTU

A

assists landing gear retraction or extension should a right engine or EDP pump fail

13
Q

the PTU is powered by

A

a hydraulic motor in hydraulic system 1

14
Q

the PTU will be automatically started when:

A
  • flaps are not set to 0 or landing gear not up
  • EDP 1 not failed
  • hydraulic reservoir 2 quantity above 12%
    (will not activate on ground)
15
Q

Hydraulic system 3 is comprised of

A
  • one reservoir
  • two electric pumps
  • one accumulator
16
Q

Hydraulic system 3 powers

A
  • elevator (right hand outboard)
  • rudder (lower)
  • ailerons (l and r outboard)
17
Q

When does hyd pump 3B automatically activate

A

electric pump 3A failure and position in AUTO

18
Q

Describe the two emergency valve in hyd system 3

A

pump unloader valve - The pump unloader valve is used to reduce the discharge pressure of electric hydraulic pump A during its start-up. This will reduce the pump torque and therefore reduce the electrical power required to start the pump.
flow limiter valve - The flow limiter valve is used to reduce the amount of flow provided by electric hydraulic pump A. This will limit the electrical power that the pump can draw and prevent the electric hydraulic pump from stalling the RAT.

19
Q

HYD 1 or 2 or 3 OVERHEAT warning

A

associated hydraulic system temp exceeded the caution operational range

20
Q

HYD 1 or 2 or 3 HI TEMP caution

A

associated hydraulic system temp exceeded normal range

21
Q

HYD 1 or 2 or 3 LO PRESS caution

A

associated hydraulic system pressure is low

22
Q

HYD PTU FAIL caution

A

PTU is not supplying hydraulic power to hydraulic system 2, or PTU automatic operation is compromised

23
Q

HYD 1 or 2 EDP NOT D-PRESS caution

A

depressurization of the associated engine driven pump has failed

24
Q

HYD 3 VLV FAIL advisory

A

one or both hydraulic system 3 valves, used during an electrical emergency, have failed

25
Q

HYD 1 or 2 EDP FAIL advisory

A

associated engine driven pump is not providing hydraulic power to the system

26
Q

HYD 1 or 2 ELEC PUMP FAIL advisory

A

associated electric pump is not providing hydraulic power to the system

27
Q

HYD 3 ELEC PUMP A or B FAIL advisory

A

associated system 3 electric pump is not providing hydraulic power to the system

28
Q

HYD 1 or 2 or 3 LO QTY advisory

A

fluid level in the associated reservoir is low

29
Q

HYD 1 or 2 SOV FAIL advisory

A

associated SOV is not in commanded position

30
Q

HYD 3 PUMP A NOT ON advisory

A

ACMP 3A is not set to ON position

31
Q

HYD PTU NOT AUTO advisory

A

PTU is not in auto position

32
Q

HYD PUMP NOT AUTO advisory

A

SYS 1 or 2 or 3 electric pump is not in auto position

33
Q

HYD TEMP SENS FAIL advisory

A

at least one of the hydraulic temperature sensors are failed and the system is unable to monitor the temperature of that system

34
Q

HYD 1 or 2 SOV CLOSED STATUS

A

associated SOV closed