Brainscape's Knowledge GenomeTM

Browse over 1 million classes created by top students, professors, publishers, and experts.


See full index

Texan > SYS - Hydraulics 1 > Flashcards

SYS - Hydraulics 1 Flashcards

1
Q

Hydraulic system pressure?

A

3000psi +/- 120psi

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
2
Q

What two hydraulic systems are there?

A

Primary and emergency

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
3
Q

What four systems does the primary hydraulic system power?

A
  • landing gear and main landing gear indoor doors
  • flaps
  • speed brake
  • nose wheel steering
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
4
Q

What does the FULL (AC) and FULL (AD) indicators on reservoir window indicate?

A

Full accumulator charged

Full accumulator discharged

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
5
Q

What pump provides pressure to the normal system?

A

Engine driven pump

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
6
Q

Min PSI before normal system can be used to power the services?

A

1800psi

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
7
Q

What drives the engine driven pump?

A

The engine accessory gearbox

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
8
Q

What manifold are the selector valves in?

A

The selector manifold

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
9
Q

How is the reservoir return pressure reduced to enable a lower pressure back to the engine driven pump?

A

A reservoir piston steps down the return side of the reservoir to 50psi

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
10
Q

When does the pressure relief valve activate?

A

3250-3500psi

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
11
Q

Purpose of the slide valve assembly?

A

Isolate the engine driven pump from the rest of the hydraulic system when emergency system is activated

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
12
Q

What happens when emergency gear extension handle pulled?

A

The slide valve closes and the emergency system is activated - the main hydraulic system is isolated and the emergency accumulator pressure is released to extend the gear and flaps.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
13
Q

Are any normal components still pressurised by the engine driven pump when the emergency system is activated?

A

Yes, nose wheel steering which is plumbed into the pressure line upstream of the power pack

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
14
Q

Can the emergency accumulator be recharged once emergency handle is pulled?

A

No

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
15
Q

Can the normal hydraulic system be returned after the emergency system is activated?

A

No - needs to be rested by maintenance on the ground - both the handle and the emergency selector valve

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
16
Q

How many electrical selector valves in the selector manifold?

A

5

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
17
Q

Normal range PSI for hydraulic system?

A

2880-3120psi

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
18
Q

What fluid level does HYD FL LO activate?

A

Below 1 quart

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
19
Q

What three occasions will emergency hydraulic system be used?

A

Failure of the primary hydraulic system
Event of engine failure (and engine driven pump)
Battery bus failure

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
20
Q

The emergency system provides for one time lowering of which systems?

A
  • landing gear and main gear indoor doors

- flaps

21
Q

Can the landing gear or flaps be raised after the emergency system has been used to lower them?

A

No

22
Q

Where does the emergency system get its hydraulic pressure from?

A

The emergency accumulator

23
Q

How is the emergency accumulator charged?

A

Pressure from the primary system presses metal below that in turn compresses helium gas inside the emergency accumulator. Also, the primary system pressurises the emergency system through a one-way check valve.

24
Q

How many emergency selector valves in the emergency manifold?

A

Two - gear and flaps

25
Q

What PSI does the emergency system pressure relief valve operate at?

A

3500psi

26
Q

What does the hydraulic fuse do?

A

Detects leaks from the normal system to the emergency system (through the one way check valve) and shuts it off to prevent loss of all hydraulic fluid from the main system to the emergency system. Detects a fluid loss rate of 0.25 gal per minute

27
Q

When does EHYD PX LO come on?

A

2400psi in emergency system

28
Q

What Bus powers the landing gear?

A

Battery bus

29
Q

How many gear doors and how many hydraulically operated versus mechanically?

A

6, four mechanical two hydraulic

30
Q

Which gear doors are independently hydraulically actuated?

A

Inboard main gear doors.

31
Q

How long does gear sequence take?

A

6 seconds

32
Q

When does the main gear unlock engage during retraction?

A

After the inboard main gear doors are closed

33
Q

Do the nose gear doors remain open when the nose gear is extended?

A

Yes

34
Q

What three things does the gear position indicator indicate?

A
  • extension or retardation of the gear and doors is incomplete
  • the gear main inboard doors are open
  • the landing gear and/or doors are in transit
35
Q

When is the gear handle red?

A
  • main gear inboard doors are not closed

- PCL is approaching idle with gear handle up

36
Q

Each gear position indicator light when red indicates? (2)

A
  • when gear or inboard doors are in transit

- when PCL is approaching idle and gear handle is up - regardless of airspeed

37
Q

Each gear position indicator light when green indicates?

A

Gear is down and locked

38
Q

When does aural gear warning activate? (3)

A
  • gear handle not down, PCL below mid range (approx 87%), airspeed below 120kts and flaps up or takeoff
  • all gear not down and loaded with flaps at landing
  • weight on wheels with gear handle not down
39
Q

Will gear aural warning silence when gear handle is placed down with flaps at takeoff or up regardless of gear position?

A

Yes - but other indications will still be present

40
Q

When can aural gear warning not be silenced?

A
  • gear and flaps landing

- gear handle up with aircraft on the ground

41
Q

If landing flaps are not selected the horn will not sound if the silence button is pressed when: (3)

A
  • airspeed above 120kts
  • PCL below approx 87%
  • subsequently aircraft slowed to below 120kts
42
Q

What warning does the airspeed sensor prevent?

A

The aural warning above 120kts, gear and flaps up, regardless of PCL position

43
Q

Which weight on wheels switch does the downlock override button override?

A

The right wow switch

44
Q

If the right wow switch has failed can the gear be raised airborne with the downlock override button?

A

No

45
Q

If the gear handle is difficult to raise should you try the downlock override button?

A

No - return the handle to the down position

46
Q

Will pulling the emergency landing gear handle lower the gear regardless of landing gear lever position?

A

Yes

47
Q

Should you first lower the landing gear lever to down before pulling the emergency landing gear handle? And why?

A

Yes, in case the normal system is still working.

48
Q

What indications will you get with the gear down via the emergency handle?

A
  • three greens, two red main gear doors, and a red gear handle

Texan (19 decks)

Brainscape helps you reach your goals faster, through stronger study habits.
© 2024 Bold Learning Solutions. Terms and Conditions