Landing Gear Struts
Dry air or Nitrogen
What is used to inflate the landing gear strut
An O´ring between the halves
What prevents a Split Wheel from leaking air through the inner and outher mating surfaces, or the wheel assembly?
Independent master cylinders, boosted brakes and power control-controlled brakes.
What are some types of brake actuating systems?
It prevents the wheels to skid or lock during brakes attempts.
What is the purpose of an anti-skid system?
Electrical or hydraulic Power.
What powers windshield wiper systems?
Hydraulic or Electrical motors
What power sources are normally used to retract landing gear systems?
Discoloration.
What is the indication of excessive heating of a wheel bearing?
Gravity and pressure methods.
What are some methods of bleeding brakes?
Touch-Down Protection
What type of anti-skid protection prevents brake application prior to touch-down?
Turbine compressor hot air, engine exhaust heat exchangers and ram air heated by a combustion heater.
What methods are used to supply heat for thermal anti-icing systems?
They keep the landing gear pointed in a straight direction.
What is the purpose of main landing gear torque links?
To relieve air pressure to prevent tire blowout
What is the purpose of a wheel fusible plug?
Reduces hydraulic system high pressure to a lower value for more satisfactory brakes action.
What is the purpose of power brake debooster?
AC wheel speed sensor
What type of anti-skid wheel sensor changes frequency output in proportion to the speed of rotation of the wheel?
Bonding, fairing strips and screws, or a combination of both.
How are deicer boots attached to the leading edges of wing and tail surfaces?
Nosewheel centering cams or external track.
What prevents a nose landing gear from being retracted with the nosewheel out of the center position?
Proper Inflation
What is the most necessary maintenance function for safe and long aircraft tire service?
Pressurize the system.
What must be accomplished before inspecting a wheel brake system for hydraulic leaks?
In the axle
Where is the anti-skid system wheel speed sensor normally mounted?
The air blast breaks the rains drops into small particles that are then blow away
How does a pneumatic rain removal system work?
Annual inspection,Replacements, Hard Landings or other programed inspecions.
When should a landing gear retraction check be accomplished?
Uneven wear near the edge of tread and creep or slip when the brakes are applied.
What are the effects of under inflation on tires?
Multi-Disc brake systems
What types of disc brakes are used on modern heavy aircraft?
Control Unit
What anti-skid system component receives signals from the wheel sensors?
It can be verified by noting the current consumption when the heater is turned on.
How can an electrically heated pitot tube with an ammeter installed in the system be checked for operation?
Mechanical, Electrical or Hydraulic.
What methods are used for transmitting cockpit control movements to a steering control unit in large aircraft?
Verify if the tire is completely deflated before removing a wheel from an axle or before wheel disassembly.
What safety precaution must be taken when removing a wheel from an axle or when disassembling a wheel?
Stators
What type of brake disc has the keyways on the inside?
Brake accumulator
What is used to keep the brake system pressurized when normal hydraulic pressure is not available?
An engine-driven vacum pump and bleed air from a turbine-engine compressor.
What are two methods of inflating pneumatic deicer boots?
A shimmy damper.
What unit prevents nosewheel vibration?
Aluminum and Magnesium
What two alloys are aircraft wheels made from?
Carbon Brakes
What type of brake material is currently found on high performance and air carrier aircraft?
DC wheel speed sensor
What type of anti-skid wheel sensor changes amplitude output in proportion to the speed of rotation of the wheel?
Remove oil before it reaches the boots damaging the rubber.
What is the function of the oil separator used in some deicer boot systems?