Landing Gear and Brakes Flashcards
How many wheels on each landing gear?
Two.
How is the landing gear raised and lowered?
Electrically controlled and hydraulically actuated.
How is the landing gear ‘locked down’ when on the ground?
Locking pins, installed and removed by maintenance.
What does the proximity sensing unit monitor and control?
Landing gear retraction and extension.
Landing gear position.
Thrust reverser status.
Door position status.
How is the main gear held in the up position?
Mechanical uplocks.
Which hydraulic system actuates the nose gear?
System 3.
How is the gear deployed if gear handle movement fails?
A manual release lever is installed to lower the main gear.
What parameters are monitored to detect a landing configuration warning sound?
Airspeed, gear handle position, flap position and thrust lever position.
When will a ‘too low gear’ sound be activated?
When lower than 190 kt and less than 500 ft on the radio altimeter.
When is the landing gear configuration warning inhibited?
For two minutes after take-off.
Which systems power the main brakes?
Hydraulic system 3 - inboard.
Hydraulic system 2 - outboard.
How much pressure will the brakes hydraulic accumulators supply in the event of a hydraulic system failure?
6 applications with the anti-skid off.
How is wheel rotation stopped after take-off during gear retraction?
Hydraulic pressure to the brakes on the main gear and a snub for the nose gear.
How is brake wear assessed?
Brake wear pins - two on each assembly.
What does the anti-skid control unit do?
Modulates hydraulic pressure to each wheel brake to ensure no skidding.
When armed, when is the anti-skid active?
Above 10 kt.
On landing w-o-w plus 5 seconds or wheel speed greater than 35 kt.
If a brake overheat occurs, when can it be reset?
After maintenance inspects the system.
Which hydraulic system powers the nose wheel steering?
System 3.
How is the nose wheel steering system controlled?
Electronically, there is no mechanical linkage.
How is the aircraft steered on the ground?
Pedals and tiller.
How much nose wheel deflection do the pedals and tiller provide?
8º pedals.
80º tiller.
When the nose wheel steering switch is armed, when will the system become active?
Weight-on-wheels.
Hydraulic pressure in system 3.
Nose gear down and locked.
What happens when the nose wheel steering switch is disarmed?
The nose wheel goes into free castoring mode.
Can the tiller and nosewheel combine to tighten taxi turns?
No.
