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G650 Intial > Landing Gear and Brakes > Flashcards

Landing Gear and Brakes Flashcards

1
Q

How is the landing gear controlled on
G650?

A

Electrically controlled, hydraulically actuated, and
electrically sequenced
Ref: AOM 2A

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2
Q

What does the light (red FAA or
white for EASA) indicate in the gear
handle?

A

Disagreement between landing gear handle and the
gear

Ref: AOM 2A

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3
Q

What’s the meaning of magenta gear
indication on flight control synoptic
page

A

Gear in transit

Ref: AOM 2A

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4
Q

How are gear failures depicted on
flight control synoptic page?

A

Amber

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5
Q

What functions are performed from
Landing Gear Control Maintenance
Panel (LGCMP)?

A

Used to open/close gear doors. Maintenance can
change WOW status, retract or extend the gear. In
maintenance mode, gear handle input is ignored.
Ref: AOM 2A

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6
Q

What’s normally accomplished after
moving the gear handle to UP after
takeoff?

A

Selection of ground spoilers to OFF: it’s the only step
of gear UP flow pattern
Ref: PTH

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7
Q

What’s the purpose of landing gear
LOCK RELEASE button?

A

It allows landing gear handle to be placed in UP
position regardless of WOW mode or electrical
power
Ref: AOM 2A

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8
Q

What’s the normal source of
hydraulics for opening and closing
the gear doors on ground?

A 
Aux pump (in the absence of hydraulic pressure from 
left system) through Landing Gear Control 
Maintenance Panel LGCMP 
Ref: AOM 2A
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9
Q

What’s the caution associated with
gear doors once they’re opened for
preflight?

A

Always pin the doors open when movement is not
desired

Ref: QRH

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10
Q

After opening the gear doors for
preflight, what must be accomplished
to put the airplane back into “ready
for flight mode?”

A

Close all gear doors and select Normal on LGCMP;
otherwise, the plane will remain in MX mode and
gear will not retract on departure.
Ref: QRH

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11
Q

What’s the location of nitrogen
bottles used for emergency landing
gear extension?

A

There are two (2) bottles: one located on each side of
nose wheel well
Ref: AOM 2A

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12
Q

What are the switches in the gear Mx panel?

A 
Wow o-ride
Maintenance switch w/pin
Guarded main gear up and down switch
Unguarded main gear door switch
Guarded nose wheel up and down switch
Unguarded nose wheel gear door switch
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13
Q

What’s the pressure on a fully
serviced emergency landing gear
extension bottle?

A

3,000 psi at 70°F/21°C; enough for only one
extension of landing gear
Ref: AOM 2A

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14
Q

What happens to uplocks when left
hydraulic system pressure is applied
during gear retraction?

A

They move to correct position.
Ref: AOM 2A

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15
Q

What happens if an uplock is found
in wrong position during preflight
and aux pump pressure is applied?

A

The hook will snap to correct position: there’s no
preflight requirement to make sure they’re open.
Ref: AOM 2A

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16
Q

What happens if you takeoff with
nose and main gear downlock safety
pins installed?

A

These pins prevent accidental gear retraction and are
designed to withstand full hydraulic system retraction
pressure. If you takeoff with pins installed, the gear
will not come up.
Ref: AOM 2A

17
Q

What should nose wheel strut
extension be during pre-flight?

A

2 to 9 inches

Ref: Maintenance Manual

18
Q

What’s the purpose of disconnecting
torque link from NWS unit during
towing?

A

It ensures NWS unit not damaged by over travel.
With steering unit torque links disconnected, nose
wheels are free to rotate 360°
Ref: AOM 2A

19
Q

Describe the WOW system

A

Two proximity sensors are installed on each landing
gear and provide WOW indications.
Ref: AOM 2A

20
Q

When is a klaxon tone generated to
warn flight crew of unsafe
conditions?

A

Either power lever at idle, flaps < 22° and any
landing gear not down and locked at
< 350’ AGL (radio altitude) OR engine power levers
at any setting, flaps > 22° and any gear not down and
locked.
Ref: AOM 2A

21
Q

How can warning horn be silenced if
flap position is > 22° and the gear is
retracted?

A

By either retracting the flaps or extending the landing
gear
Ref: AOM 2A

22
Q

How many landing gear dump valves
are there?

A

Two: one for nose and one for mains
Ref: AOM 2A

23
Q

After performing an emergency
extension, a blue DUMP legend
illuminates inside both DUMP
VALVE switches. What does this
indicate?

A

It illuminates when respective dump valves are
activated (i.e., moved from hydraulic to pneumatic
position)
Ref: AOM 2A

24
Q

What happens when you depress
either DUMP VALVE switch?

A

An electrical solenoid resets respective dump valve
for hydraulic operation and DUMP legend
extinguishes
Ref: AOM 2A

25
Q

What happens with selection of FDR
/ CMC EVENT switch?

A

It places an event stamp on FDR tape, initiates CMC
time series recording, and switch legend illuminates
blue
Ref: AOM 2A

26
Q

Describe what happens when EMER
LDG GEAR handle is pulled?

A

Emergency air release valve opens and releases
compressed nitrogen into landing gear extension
system
Ref: AOM 2A

27
Q

What’s the position of landing gear
doors following an emergency
extension?

A

Open

28
Q

What happens if both pilots are
providing brake input?

A

The greater input wins

29
Q

What’s the purpose of brake fuses?

A

They shut off applied brake fluid in case of line
rupture and fluid loss downstream
Ref: AOM 2A

30
Q

Each MLG wheel has a dedicated
brake assembly which functions as
normal toe brakes and parking
brakes. What other functions do they
perform?

A

Provides main wheel de-spin during retraction of the
landing gear
Ref: AOM 2A

31
Q

When parking brake handle is set,
what component ensures the pressure
coming from outboard accumulator is
equal to or slightly less than pressure
coming from inboard accumulator?

A

Repeater valve

32
Q

How does G650’s basic antiskid
work?

A

It’s accomplished by comparing individual wheel
deceleration rates to predetermined ideal reference
deceleration
Ref: AOM 2A

33
Q

Below what speed is antiskid
protection no longer available?

A

10 knots

34
Q

How does touchdown protection
work?

A

Zero brake pressure is applied until five (5) seconds
after WOW shifts to ground mode or wheel speed
spins up > 70 knots.

35
Q

Why is brake pressure applied during
gear extension and retraction?

A

During gear extension to check system health and
during retraction to control rate of wheel spin down

G650 Intial (17 decks)

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