FAA O&P- E.K.

What is the purpose of a torque link on an oleo strut

to keep the wheel in alignment and prevent the piston from coming out of the cylinder

A landing gear shock strut should be inflated with what gas(es)

nitrogen or dry air

What conditions should a mechanic look for during a regular inspection of the exposed piston section of a landing gear

cleanliness, evidence of damage, and proper extension

What prevents air from leaking out between the two halves of a split wheel assembly

an O-Ring

Why are fusible plugs installed on some aircraft wheels

To release the pressure generated by heat build-up before the tire blows

What safety precautions must be taken when removing a wheel from an axle or when disassembling a wheel

verify that the tire is completely deflated before removing a wheel from an axle or before wheel disassembly

What are the visible signs of excessive heating on a wheel bearing

bearing surface shows discoloration

how are the pilots nose wheel steering commands transmitted to the steering control unit of a large aircraft

steering signals may be transmitted mechanically, electrically, or hydraulically

How is the nose wheel steering mechanism usually actuated on a small aircraft

by means of a mechanical linkage connected to the rudder pedals

What is the name of the unit that prevents a nose wheel from vibrating or oscillating

a shimmy damper

What are the most common sources of power used to extend and retract landing gear

hydraulic pressure and electric motors

at what times should a gear retraction check be performed

during annual or other inspections and following a hard landing

What mechanisms ensure that the nose wheel is not turned as it retracts into its wheel well

internal centering cams in the strut or an external track

Name several types of brake actuating systems

independent master cylinders, boosted brakes, and power controlled brakes

What is the function of an anti-skid system

anti skid systems  alow large aircraft to archive max braking effectiveness without allowing wheels to skid or lock

What is the purpose of a debooster

to reduce hydraulic system high pressure to a lower value for more satisfactory brake action

Before a brake system can be inspected for leaks, what action must be accomplished

pressure must be applied to the system

What maintenance practice has the greatest impact on tire service life

ensuring that tires are properly inflated

What effects does under inflation have on aircraft tires

internal heat damage possible leading to premature tire failure, or more tread wear on the shoulder of the tires