Af A/c Landing Gear Systems

Front 1

what is the purpose of a torque link on an oleo strut?

Back 1

1. to keep the wheel in alignment
2. prevent the piston from coming out of the cylinder.

Front 2

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

Back 2

Nitrogen or Dry air

Front 3

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

Back 3

1. Cleanliness
2. Evidence of damage
3. Proper extension

Front 4

What prevents air from leaking out between the 2 halves of a split wheel assembly?

Back 4

An O-ring

Front 5

Why are fusible plugs installed on some aircraft wheels?

Back 5

to release the pressure, generated by heat build-up, before a tire blows

Front 6

what safety precaution must be taken when removing a wheel from an axle or when disassembling a wheel?

Back 6

VERIFY THAT THE TIRE IS COMPLETELY DEFLATED before removing a wheel from an axle or before wheel disassembly

Front 7

what are the visible signs of excessive heating on a wheel bearing?

Back 7

The bearing surface shows discoloration

Front 8

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

Back 8

steering signals may be transmitted mechanically, electrically, or hydraulically

Front 9

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

Back 9

by means of MECHANICAL linkage connected to the rudder pedals

Front 10

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

Back 10

SHIMMY DAMPER

Front 11

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

Back 11

Hydraulic pressure and electric motors

Front 12

at what times should a gear retraction check be performed?

Back 12

1. during Annual or other inspections
2. following a hard landing

Front 13

What mechanism ensure that a nose wheel is not turned as it retracts into its wheelwell?

Back 13

Internal centering cams in the strut
OR
an external track.

Front 14

Name several types of brake actuating systems.

Back 14

1. independant master cylinders
2. boosted brakes
3. power-controlled brakes

Front 15

what is the function of an anti-skid system?

Back 15

to allow large a/c to achieve maximum braking effectiveness without allowing wheels to skid or lock

Front 16

what is the purpose of a debooster?

Back 16

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

Front 17

describe 2 methods of bleeding brakes.

Back 17

1. a pressure pot can be attached to the bleeder valve and fluid forced back towards the master cylinder and/or reservior
2. the master cylinder can be used for forcing fluid from the reservior to the brakes

Front 18

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

Back 18

pressure must be applied to the system

Front 19

what maintenance function has the greatest impact on tire service life?

Back 19

proper inflation

Front 20

what effects does under-inflation have on aircraft tires?

Back 20

1. internal heat damage possibly leading to premature tire failure.
2. more tread wear on the shoulders than in the center