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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
Antiskid in the air?
ASCU dumps pressure to prevent wheel lock up on touchdown(withno weight on wheels)
25
When does antiskid become operational on the ground?
35 kt wheel spin up Or wow after 5 sec delay
26
Powered steering using the tiller is available when...
Armed and wow
27
For normal operation which hydraulic system is utilized for main landing gear retraction extrension?
System three
28
Which hydraulic system is used during an alternate gear extension
System 2
29
How is the main landing gear up lock released during alternate extension?
Mechanically
30
When does the shimmy damper minimize gear shimmy?
At high speeds on the ground
31
What do the brush seals provide
Aerodynamics seal
32
How are the main landing gear doors attached?
Mechanically
33
During normal operations which hydraulic system is used to retract and extend the nose landing gear?
3
34
During alternate gear extension, which hydraulic system unlocks the nose landing gear from the up lock position?
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
How many systems are required to lower the nose landing gear during hydraulic two and three failure?
At least one system is required to lower the nose landing gear (mainland to get my fall under the wrong weight)
36
When is the antiskid system armed? On the ground
Switch on Parking brake not set ( provided….Main landing gear down and locked) Sys 14-19
37
For normal operation which hydraulic system is utilized for main landing gear retraction extrension?
System three
38
Which hydraulic system is used during an alternate gear extension
System 2
39
How is the main landing gear up lock released during alternate extension?
Mechanically
40
When does the shimmy damper minimize gear shimmy?
At high speeds on the ground
41
What do the brush seals provide
Aerodynamics seal
42
How are the main landing gear doors attached?
Mechanically
43
During normal operations which hydraulic system is used to retract and extend the nose landing gear?
3
44
During alternate gear extension, which hydraulic system unlocks the nose landing gear from the up lock position?
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
How many systems are required to lower the nose landing gear during hydraulic two and three failure?
At least one system is required to lower the nose landing gear (mainland to get my fall under the wrong weight)
46
When is the antiskid system armed?
Switch on Parking brake not set ( provided….Main landing gear down and locked)
47
Mlg are fitted with _____ multi disc brakes
Steel
48
What prevents selection of ldg gear hndl on the grnd?
Solenoid lock
49
Solenoid lock malfunction?
Downlock release on ldg gear cntrl panel
50
Ext and retr is _______ activated
Electrically activated by ldg gear hdl
51
Ldg gear warning horn when?
In ldg config and gear is not extd'd Ch 8 ...... 8-283 Below 500 feet and 190 kn, and gear not down
52
When is the ldg gear cntrl hndl solenoid downlock released to permit up selection of ldg gesr cntrl hndl?
Aircraft is airborne with no WOW
53
How are the rudder pedals linked to the associated brake cntrl valves?
Mechanically
54
How many brake wear indicator pins on each brake assembly
2
55
Break temp overheat?
+14
56
If failure detected by steering cntrl unit?
Reverts to free castoring
57
Pseu monitors...
Doors Spoilers TR Park brk Flaps
58
Antiskid is operational until what speed
10 kn
59
Nose gear door position
Open when gear is extended Closed when gear is retracting
60
Landing gear and break information are displayed on what pages
Hydraulic synoptic page Status page Primary page
61
What fills the landing gear shock strut
Nitrogen
62
How many breaking applications if loss of number two and number three hydraulic system?
Six breaking applications Provided antiskid a selected off
63
In the event of a failure in the antiskid system how is manual braking restored?
By selecting the antiskid system off
64
Main landing gear held up? Down?
Mechanical uplocks up Held overcenter down
65
Red ovt at what temp?
Greater than 14
66
Wheel ovht protection ?
Each wheel bin contains a single loop over heat detection wire
67
IB BRAKE PRESSURE CAUTION
Less than 1800 psi
68
BTMS when red?
Must be inspected by mx | check plugs
69
Turn radius?
80 ft (900) 75 ft. (700)
70
When torque link connected, turn restriction?
8 degrees
71
Main ldg gear held up and locked?
Mechanically
72
With a failure of both hydraulic system two and three… accumulators will give how many break applications?
Six brake applications with anti-skid select it off
73
Antiskid armed on gnd? In flight?
Parking break not set MLG down and locked —————— WOW +5/ seconds Wheel spin up 35 kts
74
Anti-skid is available on rollout until what speed?
10 kts
75
BTMS red?
Will remain read until the BTMS overheat warn reset button is pushed
76
The break wear indicator pins Should be checked when..
Brake applied Hydraulic 2 and 3 pressurized

Crj 900 (45 decks)

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