Aircraft Landing Gear Systems
What type of valve is used in the brake actuating line to isolate the emergency brake system from the normal power brake control valve system?
A shuttle valve.
The braking action of a Cleveland disk brake is accomplished by compressing a rotating brake disk between two opposite brake linings. How is equal pressure on both sides of the rotating disk assured?
By allowing the caliper to float to automatically equalize as pressure is applied to the rotor.
How is it determined in a master cylinder brake system that all of the air has been purged from the system?
By depressing the brake and noting that the brake is firm and not spongy.
If it is determined that spongy brake action is not caused by air in the brake system, what is the next most likely cause?
Deteriorated flexible hoses.
Which statement is true with respect to an aircraft equipped with hydraulically operated multiple-disk type brake assemblies?
Do not set parking brake when brakes are hot.
What is the purpose of the torque links attached to the cylinder and piston of a landing gear oleo strut?
Maintain correct wheel alignment
What What is the purpose of a compensating port or or valve in a brake master cylinder of an independent brake system?
Permits the fluid to flow toward or away from the reservoir as temperature changes.
What is the function of a cam incorporated in a nose gear shock strut?
Straightens the nosewheel.
What action should be taken whenever maintenance is performed that will affect the landing gear system performance?
The aircraft should be placed on jacks and a retraction test should be performed.
What would be the effect if the piston return spring broke in a break master cylinder?
The brakes would drag.
What is one effect a restricted compensator port of a master cylinder will have on a brake system?
The restriction will cause slow release of the brakes.
Why do most aircraft tire manufacturers recommend that the tubes in newly installed tires be first inflated, fully deflated, and then reinflated to the correct pressure?
To allow the tube to position itself correctly inside the tire.
When working with high pressure, high performance tires, why is it recommended to deflate the tires when removing wheels from the axle?
To ensure safety in case of a defective wheel or broken tie bolts.
When servicing an air/oil shock strut with MIL-5606 the strut should be ________.
collapsed and fluid added at the filler opening
the purpose of a relief valve in a brake system is to ________.
compensate for thermal expansion
The purpose of a sequence valve in a hydraulic retractable gear system is to ________.
ensure operation of the landing gear and gear doors in the proper order
On all aircraft equipped with retractable landing gear, some means must be provided to ________.
extended the landing gear if the normal operating mechanism fails
When bleeding aircraft brakes, one of the indications that the air has been purged from the system is ________.
firm brake pedals
Power boost brake systems are used on aircraft that have ________.
high landing speeds
Instructions concerning the type of fluid and amount of air pressure to be put in a shock strut are found ________.
in the aircraft manufacturer's service manual
An automatic damping action occurs at the steering damper if for any reason the flow of high-pressure fluid is removed from the ________.
inlet of the steering damper
The repair for an out-of-tolerance toe-in condition of main landing gear wheels determined not to be the result of bent or twisted components consists of ________.
inserting, removing, or changing the location of washers or spacers at the center pivotal point of the scissor torque links
A sleeve, spacer, or bumper ring is incorporated in a landing gear oleo shock strut to ________.
limit the extension stroke
If an aircraft shock strut (air/oil type) bottoms upon initial landing contact, but functions correctly during taxi, the most probable cause is ________.
low fluid
The primary purpose for balancing aircraft wheel assemblies is to ________.
prevent heavy spots and reduce vibration
The removal, installation, and repair of landing gear tires by the holder of a private pilot certificate on an aircraft owned or operated is considered to be ________.
preventative maintenance
Extension ofan oleo shock strut is measured to determine the ________.
proper operating position of the strut
Debooster cylinders are used in brake systems primarily to ________.
reduce brake pressure to the brake and increase the volume of fluid flow
Debooster valves are used in brake systems primarily to ________.
reduce the pressure and release the brakes rapidly
The metering pins in oleo shock struts serve to ________.
retard the flow of oil as the struts are compressed
A stripe or mark applied to a wheel rim and extending onto the sidewall of a tube-type tire is a ________.
slippage mark
If a shock strut bottoms after it has been properly serviced, the ________.
strut should be removed, disassembled, and inspected
A brake debooster valve is installed in systems where the high pressure of the hydraulic system (3000 psi) is used to operate brakes ________.
that are designed to work with low pressure
The correct inflation pressure for an aircraft tire can be obtained from ________.
the aircraft service manual
When air/oil type of landing gear shock strut is used, the initial shock of landing is cushioned by ________.
the fluid being forced through a metered opening
The pressure source for power brakes is ________.
the main hydraulic system
Internal leakage in a brake master cylinder unit can cause ________.
the pedal to slowly creep down while pedal pressure is applied
If the extended longitudinal axis of the main landing gear wheel assemblies intersects aft of the aircraft, the wheels can be termed as having ________.
toe-out
Aircraft brakes requiring a large volume of fluid to operate the brakes generally ________.
use power brake control valves
To prevent a very rapid extension of an oleo shock strut after initial compression resulting from landing impact, ________.
various types of valves or orifices are used which restrict the reverse fluid flow
Overinflated aircraft tires may cause damage to the ________.
wheel flange
In brake service work, the term "bleeding brakes" is the process of ________.
withdrawing fluid from the system for the purpose of removing air that has entered the system
If an airplane equipped with master cylinders and single-disk brakes has excessive brake pedal travel, but the brakes are hard and effective, the probable cause is ________.
worn brake linings
A pilot report the right brake on an aircraft is spongy when the brake pedal is depressed in a normal manner. The probable cause is ________.
air in the brake hydraulic system
A high-speed aircraft tire with a sound cord body and bead maybe recapped ________.
an indefinite number of times
Aircraft tire pressure should be checked ________.
at least once a week or more often
On an air valve core stem, what indicates high-pressure type?
An embossed letter "H".
Aside from an external leak in the line, what will cause parking brakes to continually bleed off pressure?
An internal leak in the master cylinder.
Many brake types can be adapted to operate mechanically or hydraulically. Which type is not adaptable to mechanical operation?
Expander-tube type.
What should be checked when a shock strut bottoms during a landing?
Fluid level.
Exposure to and/or storage near which of the following is considered harmful to aircraft tires? 1. Low humidity 2. Fuel 3. Oil 4. Ozone 5. Helium 6. Electrical equipment 7. Hydraulic fluid 8. Solvents
Fuel, oil, ozone, electrical equipment, hydraulic fluid, and solvents
