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20 Cards in this Set
- Front
- Back
what is the purpose of a torque link on an oleo strut?
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1. to keep the wheel in alignment
2. prevent the piston from coming out of the cylinder. |
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A landing gear shock strut should be inflated with what gas(es)?
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Nitrogen or Dry air
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What conditions should a mechanic look for during a regular inspection of the exposed piston section of a landing gear?
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1. Cleanliness
2. Evidence of damage 3. Proper extension |
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What prevents air from leaking out between the 2 halves of a split wheel assembly?
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An O-ring
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Why are fusible plugs installed on some aircraft wheels?
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to release the pressure, generated by heat build-up, before a tire blows
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what safety precaution must be taken when removing a wheel from an axle or when disassembling a wheel?
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VERIFY THAT THE TIRE IS COMPLETELY DEFLATED before removing a wheel from an axle or before wheel disassembly
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what are the visible signs of excessive heating on a wheel bearing?
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The bearing surface shows discoloration
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how are the pilots nose wheel steering commands transmitted to the steering control unit of a large aircraft?
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steering signals may be transmitted mechanically, electrically, or hydraulically
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how is the nose wheel steering mechanism usually actuated on a small aircraft?
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by means of MECHANICAL linkage connected to the rudder pedals
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what is the name of the unit that prevents a nose wheel from vibrating or oscillating?
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SHIMMY DAMPER
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What are the most common sources of power used to extend and retract landing gear?
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Hydraulic pressure and electric motors
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at what times should a gear retraction check be performed?
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1. during Annual or other inspections
2. following a hard landing |
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What mechanism ensure that a nose wheel is not turned as it retracts into its wheelwell?
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Internal centering cams in the strut
OR an external track. |
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Name several types of brake actuating systems.
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1. independant master cylinders
2. boosted brakes 3. power-controlled brakes |
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what is the function of an anti-skid system?
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to allow large a/c to achieve maximum braking effectiveness without allowing wheels to skid or lock
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what is the purpose of a debooster?
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To reduce hydraulic system high pressure to a lower value for more satisfactory brake action
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describe 2 methods of bleeding brakes.
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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 |
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before a brake system can be inspected for leaks, what action must be accomplished?
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pressure must be applied to the system
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what maintenance function has the greatest impact on tire service life?
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proper inflation
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what effects does under-inflation have on aircraft tires?
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1. internal heat damage possibly leading to premature tire failure.
2. more tread wear on the shoulders than in the center |