ATA 32 Landing Gear Flashcards
(32 cards)
What pressure source(s) is are used to extend and retract the landing gear?
Normally system A for retraction, System B will kick in if A has low pressure.
There are ____ compressed sensors on each landing gear.
2
How is the MLG inner door positioned?
Mechanically(hockey stick).
How is the landing gear selector valve controlled?
Electrically through a lever on the P2 panel.
The landing gear control lever is actually a ______ .
Electric switch
The landing gear lever lock solenoid is energized to _______________ the lever.
Unlock.
How is the MLG locked down?
Over-center downlock with springs keeping it in position.
What is the purpose of the nose gear lock link?
Keeps it locked in the extended or retracted position.
Describe the indications for a PSEU dispatchable fault.
Maint light comes on and you go through the MAX maintenance to see if you can MEL it.
What is the purpose of the MLG or NLG transfer cylinder?
Gives time for the gear to unlock before the actuator moves the gear.
List the conditions required to allow B hydraulic pressure retract the gear.
Airplane in the air
Landing gear lever not down
One main landing gear not up
Left engine N2 speed less than 50%
Hydraulic system B pressure supplied to valve.
List the brake systems normal and alternate pressure sources.
System B is for primary and System A is for alternate.
What hydraulic system keeps the brake accumulator charged?
System B
Where is the brake accumulator located?
Right aft wing to body fairing
What component causes the switch from normal to alternate brakes?
Alternate brake selector valve pressured by System A.
Autobrakes use the ____ hydraulic system.
System B
What is the normal pressure source for nose wheel steering?
System A.
List the conditions needed to get alternate nose wheel steering.
Airplane on the ground
System B at 21%
How is nose wheel steering pressure disabled for towing?
Nose wheel bypass pin
Just for the fun of it, how many prox sensors does the NLG have, for indication and the air ground system?
4
How are the main and nose gear unlocked during a manual extension?
You pull a handle which unlocks the uplock mechanism and gravity then takes over.
The landing manual gear extension handle compartment door has a switch, what
is its purpose?
Sends a signal to the manual extend solenoid valve in the gear selector valve, will move a valve that connects all components for normal extension and retraction to hydraulic return.
Where is the Nitrogen valve on the MLG and NLG?
Inboard on the MLG and aft for NLG.
Where is the oil valve?
Front face of the shock strut
