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NCR 744 > 14 - Landing Gear > Flashcards

14 - Landing Gear Flashcards

1
Q

If hydraulic system 4 fails can parking brake be set, (if yes how)?

A

Yes

hydraulic system 1 or 2 is used

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2
Q

Can the Accumulator apply wheel brakes, (other than the parking brake)?

A

yes, but can not be used to stop the airplane

Boeing CBT

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3
Q

When does the BRAKE SOURCE light illuminate?

A

hydraulic pressure 1,2 and 4 low

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4
Q

What provides autobrake reference?

A

IRU selected by Captain on IRS Source Selector

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5
Q

The main gear trucks must be _______ to allow

retraction into the wheel wells

A

tilted and centered

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6
Q

Hydraulic power for nose and body gear retraction, extension, and steering is supplied by hydraulic system ___

Power to retract and extend the wing gear is
provided by hydraulic system ___

A

1

4

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7
Q

The normal brake system is powered by hydraulic system ___

The alternate brake system is powered by hydraulic system ____

A

4

1 or 2

Pressure-operated selector valves provide automatic brake source selection

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8
Q

Antiskid protection is provided with _______ ,

The autobrake system is available through _______

A

normal and alternate brake systems

only the normal system

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9
Q

Air/Ground Sensing System

air mode -

ground mode -

stall warning and nose gear steering systems-

A

gear tilted

gear not tilted

nose gear extension

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10
Q

On the ground, a _______ prevents movement of the gear lever from OFF to UP

Can be manually overridden by ______

In flight, the lever lock is released when ______

A

automatic lever lock

pushing and holding the Landing Gear Lever
Lock Override switch

the main gear are tilted and the body gear is centered

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11
Q

All four main gear _______ as the airplane lifts off the runway

During landing, ______ brings the gear to a level position

A

hydraulically tilt

ground load

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12
Q

Each wing gear has ______ gear door(s)

Each body gear has ______ gear door(s)

The nose gear has ______ gear door(s)

A

one hydraulically actuated and one mechanically actuated

one hydraulically actuated and two mechanically
actuated

two hydraulically actuated and two
mechanically actuated gear doors

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13
Q

When the Landing Gear lever is moved to UP, ________, ________, and the landing gear begin to retract

A

landing gear doors open

automatic braking occurs

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14
Q

After retraction, the main gear are held in the up position by ______

The nose gear is ______ in the up position

EICAS landing gear position indication changes to UP for _____ and then blanks.

Positioning the Landing Gear lever to OFF _______

A

mechanical uplocks

mechanically locked

10 seconds

depressurizes the landing gear system

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15
Q

When the Landing Gear lever is moved to DN, _______ (6)

A
  • gear doors open
  • gear are unlocked
  • gear are hydraulically powered to the down and locked position
  • downlocks are powered to the locked position
  • gear doors close (all hydraulically actuated doors)
  • main gear trucks hydraulically tilt to the flight position
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16
Q

Pushing the Alternate Gear Extend switches:
_______ (2)

What extends the gear?

_____ pull the downlocks into the locked position.

All gear doors ________ for the affected gear after alternate extension

A
  • electrically releases gear uplocks and gear door latches (allowing gear to free fall)

gravity and airloads

springs

remain open

17
Q

Tillers can turn the nose wheels up to ____
degrees
Rudder pedals can turn the nose wheels up to ____ degrees

______ inputs override ______ inputs

A

70 degrees

7 degrees

Tiller / rudder pedal

18
Q

Body gear steering operates when the nose wheel steering angle exceeds ____

Body gear steering is activated when ground speed decreases through ____

As speed increases through ____ the body gear is hydraulically centered and body gear steering is deactivated

A

20 degrees

15 knots

20 knots

19
Q

Normal brake hydraulic system is powered by hydraulic system ___

Alternate brake hydraulic system is powered by
hydraulic system ___ (if low),
hydraulic system ___

A

4

1

2

20
Q

What causes the brake source light to illuminate?

The brake accumulator provides _______

A

loss of hydraulic systems 4, 1, and 2

parking brake application

21
Q

Antiskid protection is provided in which brake systems?

Touchdown and hydroplaning protection is provided using ____

Locked wheel protection is provided using ____

A

normal and alternate

inertial ground speed

comparison with other wheel speeds

22
Q

The normal brake hydraulic system provides ______ (type of antiskid)

When a wheel speed sensor detects a skid _____

The alternate brake hydraulic system provides
______ (type of antiskid)

A

each main gear wheel with individual antiskid protection

antiskid valve reduces brake pressure until skidding stops

antiskid protection to lateral wheel pairs (forward and/or aft pair on each truck) rather than to individual wheels

23
Q

A brake torque sensor is provided at each wheel. What happens when excessive torque is detected?

Is there any difference if the alternate brake system is used?

A

a signal is sent to the antiskid valve to release brake pressure to that wheel

the signal is sent to the alternate antiskid valve
and brake pressure is released on a laterally paired wheel basis

24
Q

The autobrake system provides braking at preselected _________ for landing and full pressure for rejected takeoff

The autobrake system operates only when the _____ and _____ systems are functioning

A

deceleration rates

normal brake and antiskid

25
Q

The RTO autobrake setting commands maximum braking pressure if: (3)

A
  • the airplane is on the ground
  • groundspeed is above 85 knots, and
  • all thrust levers are closed
26
Q

On dry runways, the maximum autobrake deceleration rate in the landing mode is ______ that produced by full pedal braking

A

less than

27
Q

After landing, autobrake application begins when: (3)

A
  • ground mode is sensed,
  • all thrust levers are closed, and
  • the wheels have spun up

(To maintain the selected airplane deceleration rate, autobrake pressure is reduced as other controls, such as thrust reversers and spoilers, contribute to total deceleration. The system provides braking to a complete stop or until it is disarmed)

28
Q

Autobrake system disarms immediately if any of the following occur: (7)

A
  • pedal braking applied
  • any thrust lever advanced after landing
  • Speedbrake lever moved to DOWN detent after speedbrakes have deployed on the ground
  • DISARM or OFF position selected on Autobrakes selector
  • autobrake fault
  • normal antiskid system fault
  • loss of normal brake hydraulic pressure
29
Q

When the autobrake system disarms after landing, the Autobrakes selector moves to _____

When the autobrake system disarms during takeoff, the Autobrakes selector moves to _____

A

DISARM

remains in RTO position, but moves to OFF after takeoff

30
Q

The parking brake can be set with ______

A

normal (4), alternate (1/2) brake hydraulic system or the brake accumulator

31
Q

The brake accumulator is pressurized by ____

Accumulator pressure is shown ____

The accumulator (__is/is not__) designed to stop the aircraft

A

hydraulic system 4

on the brake accumulator pressure indicator

is not

32
Q

Do gear doors retract/indicate position when gear is manually extended?

A

Yes/No - gear door indications are inhibited (lever off to depressurize gear, manual extension activates electric motors to unlock gear and gear doors and gear free falls)

33
Q

BRAKE LIMITER EICAS message indicates ______

A

two or more brake limiters have failed on one truck

NCR 744 (23 decks)

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