Landing gear Part 2

If a shock strut bottoms after it has been properly serviced, the. strut should be disassembled and the metering pin orifice plate replaced. air pressure should be increased. strut should be removed, disassembled, and inspected.

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. To eliminate all the air between the tube and the inside of the tire. To test the entire assembly for leaks.

A pilot reports that the brake pedals have excessive travel. A probable cause is. weak return springs. lack of fluid in the brake system. oil or some foreign matter on the brake rotors and linings.

The purpose of a sequence valve in a hydraulic retractable landing gear system is to. prevent heavy landing gear from falling too rapidly upon extension. provide a means of disconnecting the normal source of hydraulic power and connecting the emergency source of power. ensure operation of the landing gear and gear doors in the proper order.

In an antiskid system, wheel skid is detected by. an electrical sensor. a discriminator. a sudden rise in brake pressure.

Extension of an oleo shock strut is measured to determine the. amount of oil in the strut. physical condition of the strut itself. proper operating position of the strut.

What action, if any, should be taken when there is a difference of more than 5 pounds of air pressure in tires mounted as duals?. Replace both tires. Correct the discrepancy and enter in the aircraft records. Replace the tire with the lowest pressure.

In a brake antiskid system, when an approaching skid is sensed, an electrical signal is sent to the skid control valve which. acts as a bypass for the debooster cylinders. relieves the hydraulic pressure on the brake. equalizes the hydraulic pressure in adjacent brakes.

A pilot reports the right brake on an aircraft is spongy when the brake pedal is depressed in a normal manner. The probable cause is. the hydraulic master cylinder piston is sticking. air in the brake hydraulic system. the hydraulic master cylinder piston return spring is weak.

On all aircraft equipped with retractable landing gear, some means must be provided to. retract and extend the landing gear if the normal operating mechanism fails. extend the landing gear if the normal operating mechanism fails. prevent the throttle from being reduced below a safe power setting while the landing gear is retracted.

What is one effect a restricted compensator port of a master cylinder will have on a brake system?. The brakes will operate normally. The reservoir will be filled by reverse flow. The restriction will cause slow release of the brakes.

An antiskid system is designed to. solely sense the deceleration rate of every main landing gear wheel. release then reapply pressure at a slightly lower value only when a skid is detected. sense the deceleration rate of every main landing gear wheel and release then reapply pressure at a slightly lower value when a skid is detected.

An electric motor used to raise and lower a landing gear would most likely be a. shunt field series-wound motor. split field shunt-wound motor. split field series-wound motor.

Which of the following statements is true?. When an airplane is slowed below approximately 20 mph, the antiskid system automatically activates to give the pilot full control of the brakes for maneuvering and parking. An antiskid system consists of two components; wheel speed sensors and control valves. When an airplane is slowed below approximately 20 mph, the antiskid system automatically deactivates to give the pilot full control of the brakes for maneuvering and parking.

Chines are used on some aircraft nose wheel tires to help. nose gear extension at higher air speeds. reduce the possibility of hydroplaning. deflect water away from the fuselage.

In shock struts, chevron seals are used to. absorb bottoming effect. prevent oil from escaping. serve as a bearing surface.

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. toe-in. negative camber.

The pressure source for power brakes is. the main hydraulic system. the power brake reservoir. a master cylinder.

When bleeding aircraft brakes, one of the indications that the air has been purged from the system is. partial brake pedal travel. full brake pedal travel. firm brake pedals.

When installing a chevron-type seal in an aircraft hydraulic cylinder, the open side of the seal should face. opposite the direction of fluid pressure. up or forward when the unit is installed in a horizontal position. the direction of fluid pressure.

The primary purpose for balancing aircraft wheel assemblies is to. prevent heavy spots and reduce vibration. distribute the aircraft weight properly. reduce excessive wear and turbulence.

(Refer to Figure 19). Which repair should be made if the gear switch was placed in UP position and the gear does not retract?. Replace electrical wire No. 15. Replace the down limit switch. Replace electrical wire No. 12.

Debooster valves are used in brake systems primarily to. ensure rapid application and release of the brakes. reduce brake pressure and maintain static pressure. reduce the pressure and release the brakes rapidly.

(Refer to Figure 10.) The trunnion nut on an aircraft landing gear requires a torque of 320 inch-pounds. To reach the nut, a 2-inch straight adapter must be used on an 18-inch torque wrench. How many foot-pounds will be indicated on the torque wrench when the required torque of the nut is reached?. 24. 28.8. 22.

The left brake is dragging excessively on an airplane on which no recent brake service work has been performed. The most probable cause is. foreign particles stuck in the master cylinder compensating port. excessively worn brake linings. low fluid supply in the brake system reservoir.

Overinflated aircraft tires may cause damage to the. brake linings. wheel hub. wheel flange.

Nose gear centering cams are used in many retractable landing gear systems. The primary purpose of the centering device is to. align the nosewheel prior to touchdown. engage the nosewheel steering. center the nosewheel before it enters the wheel well.

The fusible plugs installed in some aircraft wheels will. indicate tire tread separation. prevent overinflation. melt at a specified elevated temperature.

Which of the following functions does a skid control system perform?. Normal skid control, normal braking, fail safe protection, locked wheel skid control. Normal skid control, fail safe protection, locked wheel skid control, touchdown protection. Normal skid control, normal braking, touchdown protection, takeoff protection.

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. a violation of the Federal Aviation Regulations. a minor repair. preventive maintenance.

Which statement is true with respect to an aircraft equipped with hydraulically operated multiple-disc type brake assemblies?. There are no minimum or maximum disc clearance checks required due to the use of self-compensating cylinder assemblies. Do not set parking brake when brakes are hot. No parking brake provisions are possible for this type of brake assembly.

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. the metering pin gradually reduces the size of the orifice as the shock strut extends. the air is forced through a restricted orifice in the reverse direction.

When servicing an air/oil shock strut with MIL-5606 the strut should be. collapsed and fluid added at the filler opening. fully extended and fluid added at the filler opening. partially extended and fluid added at the filler opening.

Which of the following statements is true?. An antiskid system is designed to apply enough force to operate just above the skid point. A warning lamp lights in the flight deck when the antiskid system is turned on. An antiskid system is designed to apply enough force to operate just below the skid point.

Exposure to and/or storage near which of the following is considered harmful to aircraft tires?. Helium, fuel, oil, and low humidity. Low humidity, helium, and ozone. Fuel, oil, ozone, electrical equipment, hydraulic fluid, and solvents.

(Refer to Figure 20.) What is the minimum circumstance that will cause the landing gear warning horn to indicate an unsafe condition?. All gears up and one throttle retarded. Any gear up and both throttles retarded. Any gear not down and locked, and one throttle retarded.

An antiskid system is. a hydraulic system. an electrohydraulic system. an electrical system.

What should be checked when a shock strut bottoms during a landing?. Air pressure. Packing seals for correct installation. Fluid level.

When an air/oil type of landing gear shock strut is used, the initial shock of landing is cushioned by. compression of the air charge. the fluid being forced through a metered opening. compression of the fluid.

In most modern hydraulically actuated landing gear systems, the order of gear and fairing door operation is controlled by. sequence valves. shuttle valves. microswitches.

Aircraft tire pressure should be checked. using only a push on stick-type gauge having one-pound increments. at least once a week or more often. as soon as possible after each flight.

What action should be taken whenever maintenance is performed that will affect the landing gear system performance?. A test flight should be performed to conduct an operational check. A technician with an inspection authorization should perform a visual inspection. The aircraft should be placed on jacks and a retraction test should be performed.

Instructions concerning the type of fluid and amount of air pressure to be put in a shock strut are found. on the airplane data plate. in the aircraft operations limitations. in the aircraft manufacturer's service manual.

Debooster cylinders are used in brake systems primarily to. reduce brake pressure and maintain static pressure. relieve excessive fluid and ensure a positive release. reduce the pressure to the brake and increase the volume of fluid flow.

When will a continuous horn provide a warning in the flight deck?. When the throttle is retarded and gear is not down and locked. When the throttle is advanced and gear is down and locked. When the throttle is retarded and gear is down and locked.

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. Insufficient hydraulic fluid in the reservoir. Glazed brake linings.

Excessive wear in the center of the tread of an aircraft tire is an indication of. misalignment. underinflation. overinflation.

If an airplane equipped with master cylinders and single-disc brakes has excessive brake pedal travel, but the brakes are hard and effective, the probable cause is. the master cylinder one-way cup is leaking. worn brake linings. worn brake disc causing excessive clearance between the notches on the perimeter of the disc and the splines or keys on the wheel.

What is the minimum amount of time to wait for tires to cool before checking tire pressure in hot weather?. 3 hours. 2 hours. 1 hour.