Brainscape's Knowledge GenomeTM

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


See full index

A321 > Landing Gear > Flashcards

Landing Gear Flashcards

1
Q

How are gears and door controlled and operated ?

A

Electically controlled and hydraulically operated

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

Which system control the operation of gears and doors ?

A

Two Landing Gear Control and Interface Units (LGCIUs)

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

What are the function of LGCIUs ?

Landing Gear Control and Interface Units

A

-Control operation of gears and doors
-Supply infor abt landing gear to ECAM
-Send signal indicating whether a/c in flight or on ground to other systems

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

How does LGCIUs operate ?

Landing Gear Control and Interface Units

A

One LGCIU controls one complete gear cycle, then switch automatically to other LGCIU at the completion of retraction cycle.
Also switch over in case of failure

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

How can the system protect the L/DG ?

Landing Gear

A

Abv 260kt , a safety valve automatically cut off hydraulic supply to landing gear system

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

Which source does L/DG system take in oder to limit the gears operation ?

Landing Gear

A

ADR 1 and ADR 3

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

Can the crew lower the gear when lost hydraulic system ?

A

Yes, with gravity extention

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

How can the crew lower the gear with garvity extention ?

A

Turn the crank on central pedestal 3 times clockwise

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

What happen when turn the crank 3 times clock wise ?

A
  • 1st crank, isolate the system from hydraulic system
  • 2nd crank, unlock the doors and gears
  • 3rd crank, allow gravity to drop the gears
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
10
Q

How are gear dowlocked when using gravity extention ?

A
  • Locking spring crank the main gear into lock position
  • Aerodynamic force assist locking the nose gear
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
11
Q

Can crew reset the system after use gravity extention ?

A

Yes, turn the crank anti-clock wise 3 times

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

What green triangle light on L/DG panel indicate ?

Landing Gear

A

Gears are locked at selected position

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

What red UNLK light on L/DG panel indicate ?

Landing Gear

A

Gears are not locked at selected position

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

What happen when LGCIU 1 lost ?

Landing gear control and interface unit

A

Lost indication from L/DG panel

Landing Gear

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

What is the different btw LGCIU 1 and 2 ?

Landing gear control and interface unit

A

LGCIU 1 supplies to both L/DG panel and ECAM
LGCIU 2 supplies only ECAM

Landing gear control and interface unit

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

What RED ARROW on L/DG lever mean ?

A

Gears not down when a/c in landing configuration

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

How can you check the gear is downlocked ?

A

Open WHEEL page check at least 1 triangle on each L/DG is green

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

What indication of the triangle on WHEEL page mean ?
-Green
-Red
-No triangle
-Amber cross

A

-Green: gear is downlocked
-Red: gear is in transit
-No triangle: gear is uplocked
-Amber cross: LGCIU failed

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

Which system control the NWS and Brake ?

Nose wheel stearing

A

Brake and Steering Control Unit (BSCU) with two channels

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

What is the maximum NWS angle ?

Nose wheel stearing

A

+/- 6⁰ with rudder pedal, decrease to 0 from 40kt until 130kt
+/- 75⁰ with hand wheel, decrease to 0 from 20kt until 80kt

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
21
Q

When will NWS operate ?

Nose wheel stearing

A

-A/SKID & N/W STRG switch is ON
-Towing control lever in normal position
-One engine running
-A/C on ground
-One BSCU channel
-Yellow hydraulic press avail

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
22
Q

How can you prevent rudder pedal orders from going to BSCU ?

Brake and steering control unit

A

Pb on steering handwheel

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
23
Q

How can crew center the nose wheel after T/O ?

A

An internal cam mechanism do it automatically

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
24
Q

What does NW STRG DISC amber mean ?

A

A/C in towing position and 1 eng running

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
25
Q

What kind of brakes are fitted in main L/DG ?

A

Carbon Multidisc brakes

26
Q

Which hydraulic sysyem supplies the NORMAL BRK system ?

A

GREEN

27
Q

Which hydraulic system supplies the ALTERNATE BRK system ?

A

Yellow

28
Q

Which will back up the brake system when lost Green and Yellow system ?

A

Yellow Accumulator

29
Q

How many brake mode are there ?

A

-Normal Brake
-Alternate Brake with or without anti-skid
-Parking brake

30
Q

Which system control the alternate brake ?

A

Alternate Braking Control Unit (ABCU)

31
Q

Which system control the Antiskid ?

A

BSCU

Brake and steering control unit

32
Q

What is BSCU function ?

Brake and steering control unit

A

-Control normal brake, NWS, anti-skid
-Check residual press in brake
-Monitor brake temp
-Provide wheel speed infor to other system

33
Q

How does BSCU operate ?

Brake and steering control unit

A

One channel control at a time, changeover take place at each DOWN L/G lever selection, or in case of one channel failed.

34
Q

What is Anti-Skid sytem purpose ?

A

Provide max brake efficiency by maitaining wheel at the limit of impending skid.

35
Q

How does Anti-Skid system operate ?

A

The speed of each main gear wheel (given by tachometer) is compared with the a/c speed (reference speed). When the wheel speed decrease below 0.87 times the reference speed, brake release order are given to maintain the wheel slip at that value.

36
Q

In Anti-Skid system, how is the reference speed determined ?

A

By BSCU from horizontal acceleration of ADIRU 1 or 2 or 3
In case of ADIRUs malfunction, reference speed = the max of either main landing gear wheel speeds

37
Q

What are the condition to arm AUTO BRK ?

A

-Green avail
-Anti-skid avail
-No failure in brake system
-At least 1 ADIRU avail

38
Q

What are the AUTO BRK mode ?

A

MAX: for take off
MED/LO: for landing

39
Q

When does AUTO BRK activate ?

A

-LO/MED: the command for ground spoiler extend is detected
-MAX:the command for ground spoiler extend is detected and wheel speed > 40kt
- Two SECs must be operative

40
Q

When will AUTO BRK deactivate ?

A

-System is disarm
-Spoiler retract

41
Q

When will AUTO BRK be disarmed ?

A

-Pb switch is pushed
-At least one arming condition is lost
-After take of/touch and go
-Manual brake

42
Q

When does Normal BRK avail ?

A

-Green avail
-A/SKID & N/W STRG is ON

43
Q

When does ALT BRK with antiskid avail ?

A

-Yellow avail
-A/SKID & N/W STRG is ON
-Parking brake is not ON

44
Q

When does ALT BRK lost antiskid ?

A

A/Skid can be deativated
-Electrically (switch, power supply failure, BSCU failure)
-Hydraulically (Y+G lost)

45
Q

Which system is better when using pedal for brake ?

A

Yellow, aka alternate brake

46
Q

How can the Alternate brake system protect the wheel without antiskid ?

A

ABCU limmit the brake press at 1000 psi automatically

Alternate Brake Control Unit

47
Q

How many time can you brake using accumulator ?

A

Min 7 times full brake application

48
Q

How long can the accumulator maintain the Parking Brake ?

A

12 hours

49
Q

What is the different btw MED and LO autobrake ?

A

The diff btw two mode are the time engage after spoiler extend and deceleration rate.

50
Q

DECEL lt mean ?

light

A

Actual deceleration = 80% of selected rate

51
Q

How do you interpret the green arc appear on a wheel in WHEEL page ?

A

Hottest wheel when one brake temp exceeds 100⁰C

52
Q

What does it mean when a green arc turn amber ?

A

The corresponding brake temp > 300⁰C

53
Q

What is the maximum brake temp for take off ?

A

150⁰C with brake fan on
300⁰C without brake fan

54
Q

Anti-skid auto deactivate when ground speed is less than ….

A

20 kt

55
Q

What does the triangles in WHEEL page represent ?

A

L/DG position

56
Q

What is the maximum speed L/DG can be extend ?

A

250kt

57
Q

Landing gear operation is inhibited at what speed ?

A

260kt

58
Q

What would occur if you switch the Anti-skid off ?

A

Lost NWS and Antiskid,Yellow system supplies the brake system

59
Q

Is it require to depress the brake pedal while set parking brake ?

A

NO

60
Q

How do you verify the parking brake is set ?

A
  • ECAM MEMO
  • Triple indicator

A321 (25 decks)

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