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Atlas - 409MC > Landing Gear and Brakes > Flashcards

Landing Gear and Brakes Flashcards

1
Q

Describe the OFF position of the landing gear.

A

• Landing gear hydraulic system is depressurized.

Note:FCOM, VOL 2; 14.10.1

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2
Q

How many degrees can the nose-wheel steering system turn the nose gear with the tiller, and how many degrees with the rudder pedals?

A
  • 70 degrees in either direction with the tiller
  • 7 degrees with the rudder pedals

Note:FCOM, VOL 2; 14.10.2, and 14.10.3

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3
Q

When does RTO apply maximum brake pressure?

A
  • Airplane on the ground
  • All 4 thrust levers are closed, and
  • Above 85 knots.

Note:FCOM, VOL 2; 14.10.4; 14.20.4

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4
Q

What does the BRAKE SOURCE amber light indicate when illuminated?

A

• Active brake hydraulic sources (hydraulic systems 4, 1, and 2) have low pressure

Note:FCOM, VOL 2; 14.10.5

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5
Q

What does a white, crosshatched, expanded gear position indication mean?

A

• Respective landing gear in transit

Note:FCOM, VOL 2; 14.10.7

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6
Q

What does an amber X display on an expanded gear position mean?

A

• Landing gear position indicator inoperative

Note:FCOM, VOL 2; 14.10.7

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7
Q

What does a white empty box on the Gear synoptic display indicate?

A

• Respective landing gear door position indicators inoperative

Note:FCOM VOL 2; 14.10.8

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8
Q

What sensing systems control in flight and ground operation of various airplane systems?

A
  • Air/ground sensing system
  • Nose gear extension sensing system

Note:FCOM, VOL 2; 14.20.1

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9
Q

How does the airplane distinguish between air mode and ground mode?

A

• A combination of main gear tilt sensors

Note:FCOM, VOL 2; 14.20.1

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10
Q

Nose gear extension sensing provides a signal to relays controlling functions
in which systems?

A
  • Stall warning
  • Nose gear steering

Note:FCOM, VOL 2; 14.20.1

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11
Q

What conditions must be satisfied in order for the landing gear lever lock to release?

A
  • Main gear are tilted
  • Body gear centered

Note:FCOM, VOL 2; 14.20.1

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12
Q

Describe the sequence of events when the landing gear lever is moved UP.

A
  • The landing gear doors open
  • Automatic braking occurs
  • Landing gear begin to retract.
  • EICAS gives related indications

Note:FCOM, VOL 2; 14.20.2

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13
Q

How are the landing gear held in position after retraction?

A
  • Main gear are held in the up position by uplocks
  • The nose gear is mechanically locked in the up position.

Note:FCOM, VOL 2; 14.20.2

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14
Q

During landing gear extension, state what happens if any gear position disagrees with lever position after normal transit time.

A

• The EICAS changes to the expanded non-normal format
• Affected gear displayed as in transit, or UP if the gear never unlocked
from the up position.

Note:FCOM, VOL 2; 14.20.2

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15
Q

How does the gear extend through the alternate gear extension system?

A
  • By pushing the Alternate Gear Extend switches
  • The gear uplocks and gear door latches are electrically released.
  • The gear free-falls
  • Gravity and air loads extend the gear
  • Springs pull the downlocks into the locked position

Note:FCOM VOL 2; 14.20.2

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16
Q

When does body gear steering operate?

A

• When the nose wheel steering angle exceeds 20 degrees

Note:FCOM, VOL 2; 14.20.3

17
Q

When is body gear steering activated and when is it deactivated?

A
  • Ground speed decreasing through 15 knots
  • Ground speed increasing through 20 knots

Note:FCOM, VOL 2; 14.20.3

18
Q

What is the purpose of the brake accumulator?

A

• Provides parking brake application

Note:FCOM, VOL 2; 14.20.3

19
Q

Describe the difference between normal and alternate anti-skid braking systems.

A

• Normal brake antiskid provides each main gear wheel with individual
antiskid protection.
• Alternate brake antiskid provides antiskid protection to lateral wheel pairs
(forward and/or aft pair on each truck), rather than to individual wheels

Note:FCOM, VOL 2; 14.20.4

20
Q

How does the brake torque limiter function in the Alternate brake system?

A
  • Brake torque is sensed on an individual wheel basis.
  • Signal sent to alternate anti-skid valve.
  • Brake pressure is released on a laterally paired wheel basis.

Note:FCOM, VOL 2; 14.20.4

21
Q

When do the auto brakes apply after landing?

A
  • All thrust levers are closed
  • Ground mode sensed
  • The wheels have spun up

Note:FCOM, VOL 2; 14.20.5

22
Q

Which systems contribute to total airplane deceleration on landing and reduces autobrake pressure?

A
  • Thrust reverse
  • Spoilers

Note:FCOM, VOL 2; 14.20.4

23
Q

Give examples of what would disarm the autobrakes after landing.

A

• Pedal braking applied
• Any Thrust lever advanced after landing
• Speedbrake lever moved to DOWN detent after speedbrakes have been
deployed on the ground
• DISARM or OFF position selected on the Autobrakes selector
• Autobrake fault
• Normal antiskid system fault
• Loss of normal hydraulic pressure

Note:FCOM, VOL 2; 14.20.5

24
Q

What hydraulic system pressurizes the brake accumulator?

A

• System 4

Note:FCOM VOL 2; 14.20.5

25
Q

Can the airplane be stopped with normal accumulator pressure?

A

• No, the accumulator is not designed to stop the aircraft.

Note:FCOM, VOL 2; 14.20.5

26
Q

Why is it necessary to pressurize hydraulic system 4 before pressurizing the other systems?

A

• Precludes the transfer of hydraulic fluid from system 1 or 2 into system
4, when the parking brake is set, and then released.

Note:FCOM, VOL 2; 14.20.6

27
Q

What provides automatic brake source selection?

A

• Pressure-operated selector valves

Note:FCOM, VOL 2; 14.20.1

28
Q

What value on the brake temperature monitoring system causes the BRAKE TEMP Advisory EICAS message to appear?

A

• 5

Note:FCOM, VOL 2; 14.30.2

29
Q

What does it mean when the Brake Source light is illuminated on the Captain’s panel?

A

Active brake source (Hydraulic systems 4, 1 and 2) have low pressure

30
Q

What is the difference between the normal and alternate brake systems?

A

Normal system operates off hydraulic system 4. Autobrakes and full anti-skid is available. The alternate system operates off hydraulic system 1(if 4 fails) then 2 (if 1 fails). Anti-skid is reduced to pairs of wheels and autobrakes are not available.

31
Q

Can I select autobrakes when hydraulic system 1 is the active brake source?

A

No

32
Q

Above what ground speed does the RTO function become available?

A

85 knots

Atlas - 409MC (40 decks)

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