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ATR type Rating > skyblue CBT Landing Gear and brakes > Flashcards

skyblue CBT Landing Gear and brakes Flashcards

1
Q

what components make up each main gear?

A

2 wheels with tubeless tires and a hydro-pneumatic shock absorber

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2
Q

which hydraulic system powers the landing gear?

A

green

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3
Q

what is used to extedn the gear in the event of a hydraulic failure?

A

gravity gear extension

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4
Q

what does the gear position detection and indiaction system provide information to?

A

the crew and the MFC

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5
Q

what manages extension and retraction of landing gear?

A

MFC

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6
Q

what brakes are on each main gear?

A

2 sets of multi disk carbon brakes equipped with anti skid

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7
Q

what 3 things determine how much anti skid is delivered?

A
  • wheel slip
  • brake and tire wear
  • runway conditions
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8
Q

what does the anti skid system deliver

A

touchdown protection

wheel lock protection

anti skid

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9
Q

when will the fusable plugs release tire pressure?

A

when temperature exceeds 177C

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10
Q

what does the pressure relief valve on the wheel do?

A

protects against overpressuriatstion

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11
Q

how are the multi disk carbon brakes operated?

A

hydraulically powered pistons

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12
Q

what is each carbon brake equipped with?

A

automatic adjuster

overheat detector

wear indicator pin

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13
Q

what is max deflection of the NWS?

A

60 degrees

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14
Q

which hydraulic system powers the NWS?

A

blue

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15
Q

when will we get a WHEELS BRK HOT on the EWD with a caution and chime?

A

when any brake temperature exceeds 150C

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16
Q

what are downlock and air ground signals provided by?

A

proximity sensors

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17
Q

what provides uplock signals?

A

mechanical limit switches

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18
Q

what is the primary detection and indication system controlled by?

A

MFC 1A

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19
Q

what is the primary detection and indication system powered by?

A

DC STBY BUS

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20
Q

what is the secondary detection and indication system controlled by?

A

MFC 2

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21
Q

what is the secondary detection and indication system powered by?

A

DC BUS 2

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22
Q

what does the WOW systems supply information to?

A
  • pressurisation
  • anti-ice systems
  • other systems
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23
Q

what controls WOW system 1?

A

MFC 1B

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24
Q

what controls MFC system 2?

A

MFC 2B

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25
Q

what powers WOW system 1?

A

DC EMER BUS

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26
Q

what powers WOW system 2?

A

DC BUS 2

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27
Q

how is landing gear retracted?

A

MFC electrically controls a landing gear selectro valve in the main left gear fairing

the valve supplies green hydraulic pressure to unlock each gear

pressure is then delivered to the retraction side of the gear actuators

extension side of the actuators is then used to return hydraulic pressure to the resevoir

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28
Q

how are the nose gear doors driven?

A

mechanically

29
Q

what happens when the gear is up?

A
  • locked by an uplock mechanism
  • hydraulic pressure removed from the retraction side of the actuator
30
Q

how is the landing gear extended?

A

the MFC will supply green hydraulic pressure to retract the uplock mechanism

green hydraulic pressure is then provided to the extend side of the actuators

retract side is used to return fluid to the resevoir

31
Q

what keeps the gear in the down position once extended?

A

dual alignment folding side brace and locking springs

32
Q

what is the drag brace moitored for?

A

downlock indications

33
Q

what happens to hydraulic pressure once gear is down and locked?

A

pressure removed from extension side of the actuator

34
Q

what assists emergency gear extension on the main gear?

A

gas actuator and springs

35
Q

what assists gear extension on the nose gear?

A

mechanical extension device

36
Q

what locks gear in place when extended?

A

the braces

37
Q

what powers the NWS?

A

blue hydraulic system

38
Q

what powers the NWS selection valve?

A

DC EMER BUS

39
Q

what can the NWS be deflected to in the abscense of blue hydraulic pressure?

A

91 degrees

40
Q

what does the swivel valve do?

A

removes hydraulic pressure from the NWS when gear is not down

41
Q

what does the solenoid valve do?

A

removes hydraulic pressure from the NWS when main gear shock absorbers are not compressed

this will also mechanically centre the nose gear

42
Q

what is required for NWS?

A

all gear shock absorbers to be compressed

43
Q

what happens to the NWS if one shock absorber is released during taxi?

A

NWS will still be avialble as long as one wheel is still on the ground

44
Q

how is NWS controlled?

A

NWS switch on captains side. this arms the solenoid valve

45
Q

what are the 2 brake operating modes?

A

normal mode

emergency and parking mode

46
Q

how do braking modes provide pressure to the brakes?

A

shuttle valves

47
Q

how much pressure is available for emergency braking?

A

500psi

48
Q

when is additional pressure (more than 500psi) available for the emergency brake?

A

when below 60 knots

49
Q

how much pressure is available to the park brake?

A

3000 psi

50
Q

when should the tire be inspected?

A

if the hndle was used above 20GS to check the condition of the fusable plug

51
Q

when is anti skid available?

A

gear down and locked at faster than 10 GS

52
Q

what makes up the anti skid system?

A
  • anti skid panel
  • control box
  • antiskid module
  • 4x wheel speed transducers
53
Q

what does the anti skid do?

A

calculates optimum decel and modulates pressure to the brakes to achieve correct tire speed.

54
Q

what will anti skid system do if skidding is sensed?

A

reduce hydraulic pressure to the associated wheel

55
Q

when will the anti skid system sense a locked wheel and release brake pressure?

A

speed differential in excess of 50% detected between inne and outer pair of main wheels

56
Q

when is locked wheel protection available?

A

above 23GS

57
Q

what powers inboard anti skid?

A

DC ESS BUS

58
Q

what powers outboard anti skid?

A

DC EMER BUS

59
Q

when will the touchdown protection prevent the brakes from operating?

A
  • for 5 seconds after touchdown
  • or as long as wheel speed is below 35 knots
60
Q

when will the red gear handle light illuminate?

A
  1. flaps at 45 degrees
  2. flaps 30 degrees below 500RA

3 one power lever FI below 500RA

61
Q

when will the red UNLK display?

A

gear not down and locked or

uplock box not in open position on the ground

62
Q

up to what speed can we use the emergency brake?

A

V1

63
Q

does anti skid operate when using the emergency brake?

A

no

64
Q

where is the BRK TEMP test button?

A

F/O maintenance panel

65
Q

how is a failed anti skid channel identified?

A

amber F in the EWD message during test or failure

66
Q

when should the anti skid test not be carried out?

A

without parking brake set and engines running

67
Q

when is anti skid test mode inhibited?

A

above 17GS

68
Q

when will the park brake accumulator pressure display a failure?

A

when pressure below 1600psi

ATR type Rating (22 decks)

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