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40 Cards in this Set
- Front
- Back
A landing gear system is operated and controlled by what means?
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A landing gear system is hydraulically operated and electrically controlled.
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What does a typical fixed-wing aircraft landing gear configuration consist of?
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Two main landing gears and one steerable nose landing gear.
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In what direction does the nose landing gear of a fixed-wing aircraft retract?
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Either forward or rearward into the fuselage.
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At what time does the centering device of a nose landing gear ensure that the strut and the nose wheel are aligned?
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When the weight of the aircraft is off the gear.
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What type of landing gear is found on a H-60 helicopter?
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Nonretractable gear.
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What type of nose landing gear is found on a H-53 helicopter?
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Retractable nose gear.
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On the H-60 helicopter, what landing gear assembly includes the weight-on-wheels sensing switch?
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The left main landing gear assembly.
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What type of tail landing gear is incorporated on the H-60 helicopter?
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Cantilever type.
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During normal operation, what component disengages the down lock, allowing the nose landing gear cylinder to raise the nose gear?
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The downlock cylinder.
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During normal operation, what component closes the nose landing gear doors?
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Mechanical linkage.
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What is indicated in the pilot's position indicator when the landing gear is in transition from gear down to gear up?
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Barber poles.
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In addition to the pilot's position indicator, what other device tells you that the landing gear is in transit from gear down to gear up?
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The transition light in the landing gear handle.
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During emergency operation, what indications are shown on the pilot's position indicator and on the landing gear handle?
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The same indications as during normal landing gear operation.
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What component of the emergency landing gear system actuates the release valves on three of the four nitrogen bottles?
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The manually operated nitrogen bottle.
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What component is used to hold the doors of a landing gear system in the closed position?
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Latches.
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What are the principal components of a latch mechanism?
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Hydraulic latch cylinder, latch hook, spring-loaded linkage, and a sector.
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What component provides a main gear up-and-locked indication on the pilot's cockpit indicators?
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Up lock switch.
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What is the required clearance for a landing gear door latch roller?
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1/8 inch 3/32 inch.
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What determines the distance a landing gear door will travel?
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Length of the door linkage and adjustment of the doorstops.
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A shock struts uses hydraulic fluid and what other substance to absorb and dissipate shock?
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Compressed air or nitrogen.
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What chamber of a metering pin-type shock strut contains the hydraulic fluid?
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The lower chamber.
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Where can you find information concerning the correct type of hydraulic fluid to be used in a shock strut?
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On the instruction plate attached to the strut.
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When does the compression stroke of a shock strut begin?
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When the aircraft hits the ground.
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What part of the shock strut acts like a spring to return the strut to normal?
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The compressed air or nitrogen.
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What component of a landing gear system attaches the upper drag brace to the wheel well?
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A trunnion.
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All drop checks should be performed in accordance with what manual?
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The applicable maintenance instruction manual (MIM).
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What is the first step in performing a drop check?
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Place the aircraft on jacks.
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What is the maximum pressure required to retract and lock a landing gear during a drop check?
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1800 psi at 4 gallons per minute (gpm).
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The force applied to the axle hubs to push a landing gear into the down and locked position should not exceed what force?
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Twenty pounds.
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What device can be used to detect internal leakage of a landing gear hydraulic component?
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Ultrasonic leak detection translator.
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Other than normal servicing and removal and replacement, what other type of maintenance can be performed on a shock strut at the organizational level?
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Replacing the piston O-ring and delta rings.
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After the aircraft is on jacks, what is the next step in removing a shock strut?
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Remove the tire/wheel and brake assembly to reduce the weight of the strut.
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What type of air valve is used on most naval aircraft?
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Type MS 28889.
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How many turns and in what direction must you turn an air valve swivel nut to release the strut pressure?
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Approximately two turns counterclockwise.
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What is the proper torque for installing an air valve on a shock strut?
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100 to 110 inch-pounds.
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In what position does a shock strut need to be before it can be bled?
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Fully extended.
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When should the exposed piston of a shock strut be cleaned?
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During each preflight and postflight inspection.
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Excessive leaking of fluid from a shock strut can usually be fixed by what method?
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Deflate the strut and tighten the packing gland nut.
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What is the first step in disassembling a shock strut once it is removed from the aircraft?
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Ensure that all pressure has been removed from the strut.
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When bench testing a rebuilt shock strut, it must not leak when filled with nitrogen for how long?
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One hour.
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