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Crj 900 > Landing Gear > Flashcards

Landing Gear Flashcards

0
Q

Gear doors linked?

A

Mechanically

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1
Q

Nose doors are linked?

A

Mechanically

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2
Q

What protects main wheels against burst?

A

4 heat sensitive fusible plugs/ wheel

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3
Q

Which brakes bleed off when parked?

A

Outboard brakes

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4
Q

Which set of brakes hold for long period of times?

A

Inboards hold for longer periods

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5
Q

Nose gear retracts?

Main gear retracts?

A

Nose retracts fwd

Main retracts inboard

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6
Q

Landing gear is _______actuated?

A

Hydraulically actuated

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7
Q

When manual landing gear lever pulled?

A

MLG uplocks released( mechanically)

Bypass valve dumps hydr pressure #3 from the normal ext/retrct hydr circuits
( permitting ldg gear to partially xtend due to its own weight)

Hyd2 system pressure directed to main ldg gear aux actuators and nose gear downlock manual release actuator( thru selection of manual release handle)

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8
Q

Nose gear is assisted down during manual xtension by?

A

Airflow and 2 tension springs

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9
Q

Landing doors are linked?

A

Mechanically

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10
Q

Prox sensing system provides 5 functions..

A
  • ldg gear position
  • ldg gear position indications
  • wow
  • door-fuselage
  • -thrust reversers indications
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11
Q

Landing gear position indicator removed when?

A

30sec after gear up and locked

Flaps at 0

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12
Q

If a leak occurs in a brake line?

A

Associated hydr fuse will close the line

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13
Q

What provides reserve braking in event of hyd sys 1/2 failure?

A

Accumulators

3000 psi

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14
Q

What system provides brakes when parked?

A

Inboard?

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15
Q

When are BTMS displayed?

A

When landing gear down

Or

Brake overheat

Systems 14-21

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16
Q

BTMS overheat warning switch?

A

Resets system when condition ceases

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17
Q

ASCU?

A

ANTI SKID CONTROL CHANNEL

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18
Q

Steering tillers turns nose wheel?

Rudder pedals?

A

Tiller? 80 degrees each side of center

Rudder? 8 degrees

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19
Q

Ldg gear is hydraulically operated by system?

A

3

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20
Q

How many anti skid control valves?

A

4

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21
Q

With loss of one hydraulic system?

A

50% symmetric braking capability

With full anti skid control

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22
Q

When is BTMS displayed?

???????????

A

When landing gear indications are displayed or when any brake overheat condition exists

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23
Q

ANTI-SKID performs what pfunctions…

A

Individual wheel anti-skid cntrol

Touchdown protection

Locked wheel protection

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24
Q

Antiskid in the air?

A

ASCU dumps pressure to prevent wheel lock up on touchdown(withno weight on wheels)

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25
Q

When does antiskid become operational on the ground?

A

35 kt wheel spin up
Or
wow after 5 sec delay

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26
Q

Powered steering using the tiller is available when…

A

Armed and wow

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27
Q

For normal operation which hydraulic system is utilized for main landing gear retraction extrension?

A

System three

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28
Q

Which hydraulic system is used during an alternate gear extension

A

System 2

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29
Q

How is the main landing gear up lock released during alternate extension?

A

Mechanically

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30
Q

When does the shimmy damper minimize gear shimmy?

A

At high speeds on the ground

31
Q

What do the brush seals provide

A

Aerodynamics seal

32
Q

How are the main landing gear doors attached?

A

Mechanically

33
Q

During normal operations which hydraulic system is used to retract and extend the nose landing gear?

A

3

34
Q

During alternate gear extension, which hydraulic system unlocks the nose landing gear from the up lock position?

A

System 2 pressure is utilized to unlock the nose landing gear from the upper lock position during an alternate extension

Works when the alternate gear extension handle is pulled

35
Q

How many systems are required to lower the nose landing gear during hydraulic two and three failure?

A

At least one system is required to lower the nose landing gear

(mainland to get my fall under the wrong weight)

36
Q

When is the antiskid system armed? On the ground

A

Switch on

Parking brake not set

( provided….Main landing gear down and locked)

Sys 14-19

37
Q

For normal operation which hydraulic system is utilized for main landing gear retraction extrension?

A

System three

38
Q

Which hydraulic system is used during an alternate gear extension

A

System 2

39
Q

How is the main landing gear up lock released during alternate extension?

A

Mechanically

40
Q

When does the shimmy damper minimize gear shimmy?

A

At high speeds on the ground

41
Q

What do the brush seals provide

A

Aerodynamics seal

42
Q

How are the main landing gear doors attached?

A

Mechanically

43
Q

During normal operations which hydraulic system is used to retract and extend the nose landing gear?

A

3

44
Q

During alternate gear extension, which hydraulic system unlocks the nose landing gear from the up lock position?

A

System 2 pressure is utilized to unlock the nose landing gear from the upper lock position during an alternate extension

Works when the alternate gear extension handle is pulled

45
Q

How many systems are required to lower the nose landing gear during hydraulic two and three failure?

A

At least one system is required to lower the nose landing gear

(mainland to get my fall under the wrong weight)

46
Q

When is the antiskid system armed?

A

Switch on

Parking brake not set

( provided….Main landing gear down and locked)

47
Q

Mlg are fitted with _____ multi disc brakes

A

Steel

48
Q

What prevents selection of ldg gear hndl on the grnd?

A

Solenoid lock

49
Q

Solenoid lock malfunction?

A

Downlock release on ldg gear cntrl panel

50
Q

Ext and retr is _______ activated

A

Electrically activated by ldg gear hdl

51
Q

Ldg gear warning horn when?

A

In ldg config and gear is not extd’d

Ch 8 …… 8-283

Below 500 feet and 190 kn, and gear not down

52
Q

When is the ldg gear cntrl hndl solenoid downlock released to permit up selection of ldg gesr cntrl hndl?

A

Aircraft is airborne with no WOW

53
Q

How are the rudder pedals linked to the associated brake cntrl valves?

A

Mechanically

54
Q

How many brake wear indicator pins on each brake assembly

A

2

55
Q

Break temp overheat?

A

+14

56
Q

If failure detected by steering cntrl unit?

A

Reverts to free castoring

57
Q

Pseu monitors…

A

Doors

Spoilers

TR

Park brk

Flaps

58
Q

Antiskid is operational until what speed

A

10 kn

59
Q

Nose gear door position

A

Open when gear is extended

Closed when gear is retracting

60
Q

Landing gear and break information are displayed on what pages

A

Hydraulic synoptic page

Status page

Primary page

61
Q

What fills the landing gear shock strut

A

Nitrogen

62
Q

How many breaking applications if loss of number two and number three hydraulic system?

A

Six breaking applications

Provided antiskid a selected off

63
Q

In the event of a failure in the antiskid system how is manual braking restored?

A

By selecting the antiskid system off

64
Q

Main landing gear held up? Down?

A

Mechanical uplocks up

Held overcenter down

65
Q

Red ovt at what temp?

A

Greater than 14

66
Q

Wheel ovht protection ?

A

Each wheel bin contains a single loop over heat detection wire

67
Q

IB BRAKE PRESSURE CAUTION

A

Less than 1800 psi

68
Q

BTMS when red?

A

Must be inspected by mx

check plugs

69
Q

Turn radius?

A

80 ft (900)

75 ft. (700)

70
Q

When torque link connected, turn restriction?

A

8 degrees

71
Q

Main ldg gear held up and locked?

A

Mechanically

72
Q

With a failure of both hydraulic system two and three… accumulators will give how many break applications?

A

Six brake applications with anti-skid select it off

73
Q

Antiskid armed on gnd?

In flight?

A

Parking break not set

MLG down and locked

——————

WOW +5/ seconds

Wheel spin up 35 kts

74
Q

Anti-skid is available on rollout until what speed?

A

10 kts

75
Q

BTMS red?

A

Will remain read until the BTMS overheat warn reset button is pushed

76
Q

The break wear indicator pins Should be checked when..

A

Brake applied

Hydraulic 2 and 3 pressurized

Crj 900 (45 decks)

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