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40 Cards in this Set

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