Landing Gear Flashcards
Under what conditions will you get a gear warning tone that can’t be silenced?
1)Flap lever > 8.5 degrees
Either engine torque <50%
Both PLA
What happens when you open ALT GEAR EXTENTION DOOR?
Mechanically opens the alternate gear selector valve.
When does the anti skid system become active?
5 seconds after WOW or when wheels >35 kts whichever comes first
What are the limits of the NWS?
Tiller: 70° left/right
Rudder: 8° left/right
How is the NWS controlled and powered?
Controlled electrically by the Steering Control Unit (SCU).
Powered by hydraulic system 2
How is the landing gear controlled, activated and locked?
Electrically controlled
Hydraulically operated (sys 2)
Mechanically locked
What happens when you open the Alternate Gear Release door?
What happens if this is left open for takeoff?
Mechanically opens a bypass valve in the normal hydraulic system and gives access to the main landing gear release handle. This allows the alternate landing gear extension system to provide pressure via hand pump if gravity doesn’t lock the main gear.
Landing gear can’t be raised because main hydraulic pressure won’t be available to raise the gear.
What is the purpose of the inhibit switch behind the Alternate Gear Release Door?
Prevents the gear selector handle from operating the gear.
How long does the NWS take to engage after you turn the switch on?
8 seconds
When does the nosewheel revert to passive shimmy dampened castoring mode (NWS caution light)?
What are the castor angle limits of the nosewheel?
Nosewheel angle greater than 70°
SCU detects a system steering fault
Steering switch set to off
120°
What are the procedures for reverse taxi?
NWS on but don’t use it or rudder pedals. Crosswinds should be less than 10kts.
What does the landing gear handle light indicate?
Gear unsafe
Light sequences for Gear retraction and Gear extension?
Retraction: -L,R,N red lights on and and amber selector handle light on
- L,R,N green lights off
- Amber door advisory lights on.
- L,R,N red lights on and and amber selector handle light off
- Amber door advisory lights off
Extension: -L,R,N red lights on and and amber selector handle light on
- Amber door advisory lights on.
- L,R,N red lights on and and amber selector handle light off, L,R,N green lights come on
- Amber door advisory lights off
When will the nose wheel revert to passive shimmy dampened castoring mode?
What angle can the nose wheel castor to?
Nose wheel angle greater Han 70 degrees.
SCU detects a steering system fault.
NWS switch is off.
Castor up to 120 degrees either side of Centre.
In the event of a hydraulic system 2 failure, how many brake applications does the accumulator give you?
6
