Airbus A340 – Landing Gear - SmartCockpit - Airline training guides, Aviation, Operations, Safety

Informations on LDG GEAR INDICATOR Panel are provided by:

LGCIU 2.

BSCU.

LGCIU 1.

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!

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.

True

False.

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!

Which hydraulic system supplies the landing gear normal operation?

YELLOW.

GREEN.

BLUE.

Correct! Wrong!

Parking brake requires:

GREEN hydraulic pressure.

BLUE hydraulic pressure.

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

Correct! Wrong!

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

Each system is equipped with its own set of accumulators.

Each system is powered by a different hydraulic system.

The accumulators are part of the normal braking system.

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.

All braking systems.

Normal Braking.

Correct! Wrong!

Antiskid is available:

With BLUE hydraulic pressure only.

With GREEN hydraulic pressure only.

With GREEN or BLUE hydraulic pressure.

Correct! Wrong!

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

Brake temperature is greater than 300 deg.C.

Normal braking is inoperative.

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

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!

The purpose of the Antiskid is to :

Prevent wheel skid to improve braking efficiency.

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

Establish and maintain a selected deceleration during landing.

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!

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.

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

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

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

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

Correct! Wrong!

What does this indicate?

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.

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.

Correct! Wrong!

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

Reset the system to the normal extension and retraction mode.

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

Manually reset the landing gear downlocks.

Correct! Wrong!

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

Plus or minus 72 degrees.

Plus or minus 67 degrees.

Plus or minus 93 degrees.

Correct! Wrong!

Autobrake cannot be armed with the parking brake on.

True.

False.

Correct! Wrong!

Autobrake may be armed with the parking brake on.

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

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

During transit.

If the landing gear is not locked in selected position.

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!

Autobrake system is desarmed by:

Depressing both pedals.

Depressing the RUDDER PEDAL DISC p/b.

Depressing one pedal only.

Correct! Wrong!

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

Rudder pedal orders to the Nose Wheel Steering are deactivated.

Hydraulic isolation valve to Nose Wheel Steering is closed.

Rudder and steering handwheel inputs to nose wheel are deactivated.

Correct! Wrong!

If GREEN hydraulic pressure is not available:

Both automatic braking and Antiskid are operative.

Automatic braking is operative and Antiskid is inoperative.

Automatic braking is inoperative and Antiskid is operative.

Correct! Wrong!

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.

False.

True.

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.

Alternate braking mode with Antiskid is available:

In case of GREEN hydraulic low pressure.

When pushing on the rudder pedals.

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

Correct! Wrong!

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

No.

Yes.

It depends which LGCIU is concerned.

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!

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.

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

False

True.

Correct! Wrong!

The Brakes and Steering Control Unit (BSCU) enables:

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

Normal and Alternate Braking + Antiskid + Autobrake.

Normal and Alternate Braking.

Correct! Wrong!

During landing, Nose Wheel Steering is available on ground:

Below 45 kt.

Below 73 kt.

Below 100 kt.

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!

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

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.

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

Correct! Wrong!

Inputs to the Nose Wheel Steering are available from:

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

The steering handwheels only.

The CM1 side only.

Correct! Wrong!

What does this indicate?

The LGCIU is failed.

The LGCIU detects the associated landing gear as in transit.

A landing gear has not been correctly retracted.

Correct! Wrong!

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

Landing gear extends but landing gear doors remain opened.

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

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.

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

Inputs are algebrically added.

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

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

Correct! Wrong!

Airbus A340 – Landing Gear