Landing Gear Flashcards

1
Q

The 777 is equipped with …………… nose gear?

A

Conventional

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2
Q

Main landing gear is attached ?

A

To the wings

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3
Q

Which pair of wheels on each truck is steerable?

A

The aft

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4
Q

The main landing gear ………. for retraction & after extension

A

Tilt

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5
Q

Landing gear speed limitations?

A

270 kts or .82 Mach when the landing gear are down, & during extension & retraction

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6
Q

……………….. hydraulic system pressure opens & closes the heat doors

A

Centre.

It also retracts the nose & main landing gear.

Hydraulic pressure is removed after the landing gear & gear doors are up & locked.

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7
Q

Hydraulic pressure forces the landing gear into ………………… during retraction& unlocks the landing gear for ………………….

A

Mechanical locks, extension

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8
Q

One unlocked, the landing gear ………………………………….. Hydraulic pressure ………….. needed for the landing gear to extend

A

Free fall to the down position.

Is NOT

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9
Q

If the airplanes air/ground sensing system remains in ground mode, what can’t you do?

A

Cannot raise the landing gear

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10
Q

What unlocks the landing gear in any phase of flight?

A

The landing gear lever lock switch

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11
Q

If there’s no hydraulic pressure in the centre system, or when the gear hasn’t extended properly, how can you extend the gear?

A

Alternate gear extension

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12
Q

How does the alternate gear extension system work?

A

It uses an electrically powered hydraulic pump & centre hydraulic system fluid to unlock the landing gear & landing gear doors

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13
Q

When the Alternate Gear Extension has been used, what’s different about the sequencing?

A

Landing gear & gear doors extend without sequencing. The landing gear do not tilt.

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14
Q

When does the landing gear display extend to show all gear positions?

A

If the landing gear doesn’t extend in the normal transit time.

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15
Q

To activate the alternate gear switch you must push & hold the switch for at least …………..?

A

1 second

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16
Q

Even if there is Centre hydraulic pressure available, the landing gear doors …………………. after alternate extension

A

remain open

17
Q

Can you retract the landing gear following alternate gear extension?

A

Yes, if Centre hydraulic system pressure is available

18
Q

Rudder pedals turn the nose wheels up to …. degrees?

A

7 degrees

19
Q

Tillers turn the nose wheels up to …… degrees

A

70 degrees

20
Q

What has priority for steering?

A

Tillers override the rudder pedals if they are used at the same time.

21
Q

Which wheels are steerable?

A

Steerable Nose Wheels &
Steerable Main Aft Axle Wheels

22
Q

Main gear aft axle steering operate when the ?

A

When the nose wheels are turned approximately 13 degrees or more.

Therefore, main gear steering is controlled only by the tiller.

23
Q

The main gear aft axle wheels turn in the …….(same/opposite)…. direction of the nose wheels?

A

Opposite direction

24
Q

What does a ‘MAIN GEAR STEERING’ EICAS message indicate?

A

The msg appears if either main gear aft axle is unlocked when it should be centred.

25
Q

The Centre hydraulic system powers ?

A

Nose wheel & main gear steering (among other things)

26
Q

If the Centre hydraulic system fails, what powers the nose wheel steering?

A

Reserve fluid from the Centre system

27
Q

The tail skid retracts & extends along with the landing gear & is connected to?

A

The centre hydraulic system