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Tail wheel landing gear arrangement is generally known as?
conventional
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Retracting the landing on an aircraft reduces the parasite or induced drag?
parasitic
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Almost all modern aircraft use what landing gear arrangement?
Tricycle
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Tailwheel aircraft are highly susceptible to an abrupt uncontrolled change in direction on the ground
Ground loop
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Fairings used to enclose the wheels are known as?
wheel pants
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A bundle of small strands of rubber encased in a loosely woven cloth tube is known as?
A bungee cord
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The most widely used shock absorber? and is commonly known as?
oil-air shock absorber commonly called oleo
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Oleos absorb landing impact and transfers the energy into?
heat
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What is the most critical area of the wheel?
Bead area
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Oleo strut inflation is checked by measuring the length of exposed ?
piston tube
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Modern aircraft wheels are usually one or two peice wheels?
Two peice sealed by o-ring
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Aircraft wheels may be cast or forged of either ____ or ____ alloy.
aluminum or magnesium
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In cases of extreme overheating what safety is installed on the inboard wheel half?
fusible plugs that melt at a lower temperature
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What is procedure is sometimes required on certain wheel installations?
preloading the bearings
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What must be done before attempting to remove the wheel?
deflate the tire
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What should not be done when drying bearings with compressed air?
No spinning bearings
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Water stains on a bearing indicates what?
intergranular corrosion and should be rejected
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To ensure all tire pressure is relieved , what should be done?
remove valve core
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Aircraft bearings should be cleaned with steam. true or false
False , clean with solvent
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Discolored bearings is an indication of?
Overheating
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Dye penetrant inspection is a good method to find cracks in the bead area of the wheel. true or false
False, eddy current should be used
-
Screwdrivers should not be used to pry on tires. true or false
true
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Wheel bolts should be inspected using what method?
Mag particle
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What must be done if one of the fusible plugs shows signs of softening?
Replace all of the fusible plugs
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What is used to reduce nose wheel oscillations?
Shimmy dampner
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If the tops of the wheels are closer together than the bottoms the wheels is said to be?
Negative camber
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If the front of the wheels are closer together than the rear , it is said to be?
Toe-in
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Retractible gear aircraft must have a way to (raise or lower) the landing gear in case of failure of primary system.
Lower
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What are 4 methods of back-up gear extension?
- Mechanical
- compressed air
- free fall
- alternate hydraulic
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What is installed in the gear retraction system to prevent the gear from being retracted on the ground?
Squat switch ,saftey switch , weight on wheels switch
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Down and lock lights are what color?
Green
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A gear warning horn will sound when?
any of the gear is down and the throttles are retarded
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Metallic brake linings are also known as?
Sintered linings
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Power brakes are operated using pressure from the?
Main hydraulic system
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Boosted brakes apply power from where?
an independant master cylender
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When the disc is keyed and rotates with the wheel it is?
floating-disc brake system
-
Powdered metal that is melded by pressure and heat is known as?
sintering
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If the brake system uses a fixed disc,what must float?
the caliper
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What are 2 causes of spongy brakes?
- Air in the system and
- deterioration of the brake lines
-
When a brake fails to completely release it is said to be?
Dragging
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What causes brake chattering?
warped or glazed discs
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After a brake has been rebuilt it must be bench tested for ___ and ___ before being installed on aircraft.
leakage and proper operation
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After replacing brake linings, what should be done?
new linings should be burnt in or conditioned
-
Brake linings should be installed with the lettering ______ from the disc.
Facing away
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What must be done if an incompatible brake fluid is used?
drained, flushed, and all seals replaced
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What is sometimes used as an emergency braking system.
Pnuematic
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Removing air from the brake system is known as ?
bleeding
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Anytime the brakes shows signs of ____ , they must be removed, inspected, and rebuilt.
Overheating
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Stopping a leak by tightening a MS fitting is acceptable?
Not, over-torquing will cause leak to increase
-
True or False. Cleaveland brake linings can be replaced without removing the calipers.
True
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The most important part of the tire is?
the bead
-
The carcass of the tire is made up of ?
layers of rubber coated - nylon cord fabric cut into strips and layed at 45 degree angles and 90degrees to each other
-
The bead of the tire is made of?
High strength carbon steel wire bundles
-
Tubes are prevented from pinching on installation by dusting with?
Talc powder
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The ply rating relates to ?
Maximum static load and inflation pressure
-
Type 8 tires are used for?
high performance jet aircraft and high speed take-offs
-
Type 3 tires are used on?
piston powered ,low pressure tires
-
Type 7 tires are used on?
Jet aircraft
-
Chines on tires do what?
deflect slush and mud away from engine intakes
-
Inflation pressure should always be checked when the tire is ?
cold
-
When tires are inflated they should be done in what?
a tire cage
-
Wheel bolts should be lubricated with anti-seize. true or false
true
-
Wheel bolt should be tightened how?
one smooth pull of the torque wrench
-
Tube tires should be inflate to seat the bead, deflated then inflated to proper pressure. Why?
allows tube to straighten itself and remove any wrinkles
-
A line should be painted across the wheel and tire. why?
Slippage mark
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Where are 3 places to install balance weights?
- -Brackets mounted under the heads of wheel bolts
- -lead strips that adhere to inside of wheel
- -fasten to wheel rim by cotter pin
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Tubeless tires are identified by the word _____ on the sidewall.
Tubeless
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Tires with chines are usually located ?
on the nose wheel
-
The greatest heat is caused by a tire that is (over or under) inflated.
Under
-
The most popular tread pattern today is the?
rib tread
-
Retreading is acceptable or unacceptable in aircraft?
acceptable
-
The ply rating indicates the actual number of plies in the tire?
not anymore
-
The red dot on the tire indicates?
the tires light point
-
top 2 reasons for a leaking tube?
- hole in the tube
- defective valve
-
If a tube is leaking first check?
valve ., by spreading a drop of valse over the end
-
Ozone is not harmful to rubber. true or false
false
-
Where should tubes be stored?
In a cool, dry place, away from electrical eqiupment that produces ozone
-
If a bead area of a tire is damaged is it repairable?
Nope
-
What type of seal is used in between wheel halves?
O-ring
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The most important preventitive maintenance is maintaining proper _____.
tire pressure
-
What does the yellow mark on the tube indicate?
heavy point, if there is no yellow mark , the valve stem is considered the heavy point
-
Tires should be inflated _____.
slowly and gradually
-
the loss of contact of tires to pavement on take-off or taxi due to water is known as?
Hydroplaning
-
How long should new tires be allowed to remain with no load applied to them when installed?
12 to 24 hours
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