Airbus A340 - Landing gear

When depressing the RUDDER PEDAL DISC p/b on a steering handwheel:

Rudder and steering handwheel inputs to nose wheel are deactivated.

Rudder pedal orders to the Nose Wheel Steering are deactivated.

Hydraulic isolation valve to Nose Wheel Steering is closed.

Correct! Wrong!

In the event of an aborted takeoff with autobrake armed, automatic braking is initiated:

At Ground Spoilers extension.

At 110 kt.

At Ground Spoilers extension provided speed is below 72 kt.

Correct! Wrong!

Engines are running but BLUE HYD pressure or BLUE HYD ACCU PRESS pressure are not available. Which braking modes are still operative after having set Park Brake Selector to "ON"?

Alternate Braking.

Normal Braking.

All braking systems.

Correct! Wrong!

What does this indicate?

The LGCIU detects the associated landing gear as in transit.

The LGCIU is failed.

A landing gear has not been correctly retracted.

Correct! Wrong!

IAS is 290 kt - L/G Lever is set to "Down" position:

Landing gear doesn't not extend because no hydraulic power is available.

Landing gear extends but landing gear doors remain opened.

Landing gear extends but it is over VLE, a check has to be performed by Maintenance after landing.

Correct! Wrong!

All gears and doors are hydraulically-actuated by the green hydraulic system. Hydraulic supply is automatically isolated by closing a safety valve above 280 kt. It is maintained closed until the landing gear lever is moved to the DOWN position and the aircraft speed decreases below 280 kt.

Informations on LDG GEAR INDICATOR Panel are provided by:

LGCIU 2.

LGCIU 1.

BSCU.

Correct! Wrong!

Which hydraulic system supplies the landing gear normal operation?

GREEN.

BLUE.

YELLOW.

Correct! Wrong!

The crew may arm the Autobrake system provided all following conditions are met:

GREEN pressure available - Antiskid electrically powered - no failure in the braking system.

GREEN pressure available - Antiskid deactivated - no failure in the braking system.

BLUE pressure available - Antiskid electrically powered - no failure in the braking system.

Correct! Wrong!

In case of one LGCIU (Landing Gear Control and Indicator Unit) failure, is the landing gear system affected?

It depends which LGCIU is concerned.

No.

Yes.

Correct! Wrong!

In case of GREEN hydraulic system loss:

Gear extension is done by gravity, Nose Wheel Steering and normal braking are lost.

Gear extension is done using the BLUE hydraulic system, Nose Wheel Steering is lost.

Gear extension is done by gravity, Nose Wheel Steering and braking are unaffected.

Correct! Wrong!

If landing gear gravity extension is performed, which of the following statement is correct?

Both main landing gear and nose gear doors remain opened and Nose Wheel Steering is inoperative.

All landing gear extend but Nose Wheel Steering is inoperative.

Both main landing gear and nose gear doors remain opened and Nose Wheel Steering is operative.

Correct! Wrong!

If both pilots turn their steering handwheels at the same time:

Priority is given to the first pilot who turns its handwheel.

Inputs are algebrically added only if both handwheels are turned in the same direction.

Inputs are algebrically added.

Correct! Wrong!

The Brakes and Steering Control Unit (BSCU) enables:

Normal and Alternate Braking + Antiskid + Autobrake.

Normal and Alternate Braking.

Normal and Alternate Braking + Antiskid + Autobrake + Brake Temperature.

Correct! Wrong!

Autobrake cannot be armed with the parking brake on.

True.

False.

Correct! Wrong!

Autobrake may be armed with the parking brake on.

If GREEN hydraulic pressure is not available:

Automatic braking is inoperative and Antiskid is operative.

Automatic braking is operative and Antiskid is inoperative.

Both automatic braking and Antiskid are operative.

Correct! Wrong!

There are two braking systems available, the normal and the alternate system:

Each system is powered by a different hydraulic system.

Each system is equipped with its own set of accumulators.

The accumulators are part of the normal braking system.

Correct! Wrong!

What does this indicate?

The associated landing gear position disagrees with the lever position following a 30 s (A340-200 and 300) or 40 s (A340-500 and 600) time delay.

The associated landing gear position disagrees with the lever position following a 30 s time delay.

The associated landing gear position disagrees with the LGCIU 1 and LGCIU 2.

Correct! Wrong!

Inputs to the Nose Wheel Steering are available from:

The steering handwheels only.

The steering handwheels, the rudder pedals and A/P orders.

The CM1 side only.

Correct! Wrong!

When the landing gear lever is down, one LGCIU locked down indication (one green triangle per gear) is sufficient to indicate that the landing gear is down and locked.

True.

False.

Correct! Wrong!

Parking brake requires:

BLUE hydraulic pressure.

GREEN hydraulic pressure for normal use. BLUE hydraulic pressure for alternate.

GREEN hydraulic pressure.

Correct! Wrong!

The purpose of the RESET position on the LDG GEAR GRVTY EXTN panel is to:

Actuate BLUE ELEC pump to provide an alternate source of hydraulic pressure to the landing gear system.

Reset the system to the normal extension and retraction mode.

Manually reset the landing gear downlocks.

Correct! Wrong!

Alternate braking mode with Antiskid is available:

If A/SKID and N/W STRG switch is set to Off position.

When pushing on the rudder pedals.

In case of GREEN hydraulic low pressure.

Correct! Wrong!

What does an ECAM memo N/W STRG DISC mean?

Nose Wheel Steering selector on nose gear is on "towing" position.

RUDDER PEDAL DISC p/b is being pushed.

BSCU is inoperative.

Correct! Wrong!

Autobrake system is desarmed by:

Depressing one pedal only.

Depressing both pedals.

Depressing the RUDDER PEDAL DISC p/b.

Correct! Wrong!

For A340-200 and 300 aircraft, the center landing gear may be inhibited by ground maintenance action. Therefore, it will be mechanically-fixed in the uplock position while doors will continue to operate during the landing gear retract/extend sequence.

False.

True

Correct! Wrong!

Antiskid is available:

With BLUE hydraulic pressure only.

With GREEN or BLUE hydraulic pressure.

With GREEN hydraulic pressure only.

Correct! Wrong!

If Brake and Steering Control Unit (BSCU) channel 1 and 2 are inoperative:

Alternate Braking and Antiskid are still available.

Alternate Braking is available. Antiskid is unavailable.

Normal and Alternate Braking are lost.

Correct! Wrong!

With the A/SKID and N/W STRG switch set to OFF:

Steering is not energized but A/SKID is " ON ", when A/C is in motion on ground.

Both N/W STRG and A/SKID are de-energized.

The A/C uses alternate brakes and Antiskid is available.

Correct! Wrong!

If one UNLK indication remains on at gear extension, the landing gear position can be confirmed using the WHEEL SD page (information from LGCIU 1 and 2): only one green triangle on each landing gear is sufficient to confirm that the landing gear is downlocked.

False.

True.

Correct! Wrong!

The two-wheel nose gear comprises an oleopneumatic shock strut and a nosewheel steering system. It retracts backwards into the fuselage.

True.

False.

Correct! Wrong!

The two-wheel nose gear retracts forward into the fuselage.

During gear door opening and closure, main and center (for A340-500 and 600 only) landing gear wheels are automatically braked by the normal braking system.

True.

False.

Correct! Wrong!

For A340-500 and 600 only, landing gear wheels are automatically braked by the normal braking system but only during gear door opening.

The steering handwheels control the nosewheel steering angle up to _____ in either direction.

Plus or minus 67 degrees.

Plus or minus 72 degrees.

Plus or minus 93 degrees.

Correct! Wrong!

The RED ARROW on the LDG GEAR SELECTOR LEVER Panel illuminates:

If the landing gear is not locked in selected position.

If the landing gear is not downlocked with radio height lower than 750 ft AGL.

During transit.

Correct! Wrong!

The purpose of the Antiskid is to :

Establish and maintain a selected deceleration during landing.

Reduce the braking delay in the event of a rejected takeoff.

Prevent wheel skid to improve braking efficiency.

Correct! Wrong!

Nose wheel steering is provided by two actuators, powered by the green hydraulic system and electrically-signalled by the Brake and Steering Control Unit (BSCU). To control the steering the BSCU receives inputs from:

The steering hand wheels, the braking pedals and the rudder pedals.

The steering hand wheels, the braking pedals, the autopilot and the rudder pedals.

The steering hand wheels, the rudder pedals, and the autopilot.

Correct! Wrong!

The BSCU has two independent systems. Only one is active at a time, while the other is on standby.

A green arc overhead wheel temperature on ECAM "WHEEL" page indicates:

Normal braking is inoperative.

This wheel is the hottest and Brake Temp is over 100 deg.C.

Brake temperature is greater than 300 deg.C.

Correct! Wrong!

During landing, Nose Wheel Steering is available on ground:

Below 100 kt.

Below 45 kt.

Below 73 kt.

Correct! Wrong!

After a free fall extension, it is possible to restore normal operation, provided green hydraulic pressure is available.

False

True.

Correct! Wrong!

Airbus A340 – Landing Gear

Quiz

Airbus A340 - Landing gear

When depressing the RUDDER PEDAL DISC p/b on a steering handwheel:

In the event of an aborted takeoff with autobrake armed, automatic braking is initiated:

Engines are running but BLUE HYD pressure or BLUE HYD ACCU PRESS pressure are not available. Which braking modes are still operative after having set Park Brake Selector to "ON"?

What does this indicate?

IAS is 290 kt - L/G Lever is set to "Down" position:

Informations on LDG GEAR INDICATOR Panel are provided by:

Which hydraulic system supplies the landing gear normal operation?

The crew may arm the Autobrake system provided all following conditions are met:

In case of one LGCIU (Landing Gear Control and Indicator Unit) failure, is the landing gear system affected?

In case of GREEN hydraulic system loss:

If landing gear gravity extension is performed, which of the following statement is correct?

If both pilots turn their steering handwheels at the same time:

The Brakes and Steering Control Unit (BSCU) enables:

Autobrake cannot be armed with the parking brake on.

If GREEN hydraulic pressure is not available:

There are two braking systems available, the normal and the alternate system:

What does this indicate?

Inputs to the Nose Wheel Steering are available from:

When the landing gear lever is down, one LGCIU locked down indication (one green triangle per gear) is sufficient to indicate that the landing gear is down and locked.

Parking brake requires:

The purpose of the RESET position on the LDG GEAR GRVTY EXTN panel is to:

Alternate braking mode with Antiskid is available:

What does an ECAM memo N/W STRG DISC mean?

Autobrake system is desarmed by:

For A340-200 and 300 aircraft, the center landing gear may be inhibited by ground maintenance action. Therefore, it will be mechanically-fixed in the uplock position while doors will continue to operate during the landing gear retract/extend sequence.

Antiskid is available:

If Brake and Steering Control Unit (BSCU) channel 1 and 2 are inoperative:

With the A/SKID and N/W STRG switch set to OFF:

If one UNLK indication remains on at gear extension, the landing gear position can be confirmed using the WHEEL SD page (information from LGCIU 1 and 2): only one green triangle on each landing gear is sufficient to confirm that the landing gear is downlocked.

The two-wheel nose gear comprises an oleopneumatic shock strut and a nosewheel steering system. It retracts backwards into the fuselage.

During gear door opening and closure, main and center (for A340-500 and 600 only) landing gear wheels are automatically braked by the normal braking system.

The steering handwheels control the nosewheel steering angle up to _____ in either direction.

The RED ARROW on the LDG GEAR SELECTOR LEVER Panel illuminates:

The purpose of the Antiskid is to :

Nose wheel steering is provided by two actuators, powered by the green hydraulic system and electrically-signalled by the Brake and Steering Control Unit (BSCU). To control the steering the BSCU receives inputs from:

A green arc overhead wheel temperature on ECAM "WHEEL" page indicates:

During landing, Nose Wheel Steering is available on ground:

After a free fall extension, it is possible to restore normal operation, provided green hydraulic pressure is available.