Landing Gear Flashcards
(37 cards)
What type of landing gear is mounted to the airframe fuselage?
4 non retractable landing gear
The landing gear consists of fixed dual wheel assemblies in the front and single wheel assemblies in the rear with hydraulic locks.
What is the function of hydraulic locks on the aft gear?
Prevent castoring
When unlocked, the aft gear can castor 360 degrees.
Which aft landing gear is steerable and how is it controlled?
Aft right gear; controlled from the cockpit
This allows for enhanced maneuverability during ground operations.
What type of braking system is provided on all four landing gears?
Hydraulic wheel brakes
This system allows simultaneous braking of the right and left wheels.
How does the power-assisted servo system for wheel brakes work?
Pressure is proportionate to foot pressure applied to the pedals
The utility hydraulic system assists in braking.
What feature allows either pilot to apply brake pressure?
Master cylinder with transfer valves
This system enables shared control over brake pressure lines.
What must be done to operate the parking brake?
Push toe brakes and pull out a handle
To release, press either right toe pedal.
What is the function of the pressure reducing valve?
Reduces utility hydraulic pressure from 3350 psi to 1390 psi
Located in the forward transmission area, it consists of two valves.
What happens when pressure is applied to the brake master cylinder?
Brake rod and piston are depressed, forcing fluid out of the brake port
This action pressurizes the brake lines to apply the brakes.
How can limited braking be achieved without the AGB?
Using the UTIL overhead switch to release stored accumulator pressure
This provides a backup braking method.
Describe the parking brake valve and its operation.
Spring loaded, thermally compensated, 4 way valve
Closes ports to trap pressure when the handle is pulled out.
What does the brake pressure switch do?
Closes at 620 psi and reopens at 550-600 psi
Illuminates the PARKING BRAKE ON annunciator.
What type of wheels do the forward landing legs have?
Twin wheels
Aft landing legs have single full swivel wheels.
How can the aft landing gear be centered and locked?
Hydraulically
This feature aids in maintaining proper alignment during taxiing.
What controls the steering of the aft right landing gear?
Steering control knob on the center console
This is part of the electrically controlled hydraulic power steering assembly.
What activates the squat switch associated with the aft left wheel?
Aft left wheel contact
This is tied to the #1 and #2 AFCS for landing gear operations.
What is the best landing technique on a slope?
Aft wheels down first to reduce pitch sensitivity and disable signal to DASH. Last off is most stable option.
What does the power steering switch control?
It is a three-position switch labeled lock, unlock, and steer on the back of the center console.
What voltage does the lock position of the power steering switch use?
28 VDC from the No. 2 DC BUS.
What pressure is used to center and lock the wheels in trail position?
3,000 psi utility hydraulic pressure.
What happens when the power steering switch is set to unlock?
Valves are open allowing 360 degrees of free castering.
What must be engaged for all takeoff and landings?
Power steering lock.
What happens to AFCS heading hold when the power steering switch is set to unlock?
It is disengaged.
