Airframe Systems & Components: Aircraft Landing Gear Systems 🔊 Flashcards
What are two sources of power used to extend and retract landing gear?
Electrical and hydraulic
When should landing gear retraction checks be accomplished?
During annual and other type inspections, after replacing landing gear components, and after any hard landing
What is used to inflate an oleo type landing gear shock strut?
High pressure source of dry air or nitrogen
Where would you look to find proper tire inflation information?
In the Operation Manual and the Aircraft Maintenance Manual in special tire inflation pressure charts based on gross weight
What is the purpose of a hydraulic shimmy damper?
It is designed to prevent nose wheel vibrations or “shimmy” during taxiing, landing, and takeoff.
What type of care should be given to landing gear shock struts?
Inspect regularly for leakage of fluid and proper extension. The exposed portion should be wiped clean daily and inspected for scoring or corrosion.
What is the effect of under inflated tires?
They are more likely to creep or slip on the wheel when landing or braking. They also cause rapid, uneven wear at or near the edges of the tread.
What is the purpose of the rubber o-ring mounted on the mating surface of the outer wheel half of a split type wheel?
Prevents air leakage from a tubeless tire
What are three types of aircraft brake systems?
Independent, power boosted, and power control type
What is the purpose of a shuttle valve in a power control system?
They isolate the emergency brake system from the normal one allowing the fluid to actuate the emergency brakes
What is the purpose of the main landing gear torque link?
Keep the landing gear in alignment
What is used to prevent a nose gear from being retracted with the wheel out of center position?
Centering devices such as an internal centering cam or an external track
What is used in a split wheel assembly to keep air from leaking out between the wheel halves?
An o-ring
What is the purpose of the fusible plug in some aircraft wheels?
It is designed to melt at a specific temperature and relieve air pressure to prevent the tire from blowing out or damaging the wheel
How should aircraft tires be stored?
In a cool, dry place, away from chemicals, oils, or sunlight
What is the most important maintenance consideration for aircraft tires?
Ensure they are properly inflated
What safety procedure should be followed when inflating tires in general?
Inflate them inside a cage
What is the purpose of the anti-skid system?
To bring the airplane to a stop without skidding by providing the most effective braking power
What task should be accomplished if the aircraft brakes are spongy?
Brakes need to be bled
What are two methods of bleeding brakes?
Gravity method and pressure method
When inspecting brakes, what do you look for?
- Check for leaks while the system is pressurized
- Check flex hoses for swelling, cracking, or soft spots
- Check brake pedals for spongy actuation (air in system)
- Check brake pedals for excessive travel (worn linings)
What must you do before disassembling an oleo strut?
Discharge the pressure
Where can you find instructions for jacking one wheel of an aircraft to change a tire?
Aircraft maintenance manual
