Airframe V Landing Gear & Systems (Ch 13)

pontoons

The gear features ______ for water landing with extendable wheels for landings on hard surfaces.

The resulting angle of the aircraft fuselage, when fitted with conventional gear, allows the use of a __________ that compensates for older, underpowered engine design.

long propeller

differential braking (page13-3)

It simply casters as steering is accomplished with ___________ during taxi

steering systems (page13-4)

These include air/oil shock struts, gear alignment units, support units, retraction and safety devices, ____________ wheel and brake assemblies, etc.

parasite drag (page13-5)

As the speed of the aircraft increases, the drag caused by the landing gear becomes greater and a means to retract the gear to eliminate __________ is required, despite the weight of the mechanism.

transferred (13-6)

The gear flexes initially and forces are __________ as it returns to its original position

skid-type (page13-7)

Modern aircraft that use _________ landing gear make use of rigid landing gear with no significant ill effects.

more fluid (page13-8)

When a narrow portion of the pin is in the orifice, __________ can pass to the upper chamber

lower bearing (page13-9)

A packing gland wiper ring is also installed in a groove in the ___________ or gland nut on most shock struts.

rotate 360° (page13-10)

Disengagement of this pin allows the wheel fork spindle on some aircraft to _____________, thus enabling the aircraft to be turned in a tight radius.

upper cylinder (page13-11)

Energy stored in the compressed air in the ________________ causes the aircraft to start moving upward in relation to the ground and lower strut cylinder as the strut tries to rebound to its normal position.

internal stem (page13-12)

The swivel nuts on both valves engage threads on an _________________ that loosens or draws tight the valve stem to a metal seat.

excess heating (page13-13)

Shock struts should always be inflated slowly to avoid _______________ and over inflation.

components (page13-14)

Retractable landing gear consist of several ______________ that enable it to function.

Toe-in and toe-out refer to the path a main wheel would take in relation to the _______________ longitudinal axis or centerline if the wheel was free to roll forward.

airframe (page13-15)

tapered shims (page13-16)

On aircraft with spring steel gear, ______________ can be added or removed between the bolt-on wheel axle and the axle mounting flange on the strut.

linear motion

The rotary motion of the motor is converted to ______________ to actuate the gear.

gear-down line (page13-18)

When the gear reach the down and locked position, pressure builds in the ______________ from the pump and the low-pressure control valve unseats to return the fluid to the reservoir.

check valve (page13-19)

Fluid from the pump flows thought the gear-up ______________ to the gear-up sides of the actuating cylinders.

retraction and extension

These units are interconnected so that they permit properly sequenced ________________ of the landing gear and the landing gear doors.

sequence valves

When the doors are fully open, the door actuator engages the plungers of both _____________ to open the valves.

inductor (page13-22)

When the gear is in the designed position, the metallic target is close to the _____________  in the sensor which reduces the return voltage.

safe (page13-23)

Three green lights means it is ______ to land.

rotate (page13-24)

When weight returns to the wheels after landing, the shock strut is compressed, and the centering cams separate allowing the lower shock strut (piston) to_________ in the upper strut cylinder.

fly apart (13-25)

Do not direct the air so that it spins the bearing as without lubrication, this could cause the bearing to __________ resulting in injury.

permit emergency (13-26)

Cables on the landing gear emergency extension system are connected to the sector to ___________________ release of the latch rollers.

manufacturer’s maintenance manual (13-27)

The ____________________________________ specifies the length of the linkages and gives procedure for adjusting the stops.

pedal horns (13-29)

Push-pull tubes are connected to ________________ on the lower strut cylinder.

hydraulic (13-30)

A shimmy damper controls nose wheel shimmy through __________ damping.

bleed hole (13-32)

As the lower strut cylinder tries to shimmy, hydraulic fluid is forced through a ____________ in the piston.

Stiffer (13-33)

As aircraft tires were improved for the purpose they serve, they were made __________ to better absorb the forces of landing without blowing out or separating from the rim.

contacts (13-34)

The bead seat area of a wheel is where the tire actually ____________ the wheel.

Capped (13-35)

The outer bearing and end of the axle is _________ to prevent contaminants from entering this area.

melted (13-36)

Inspect thermal plugs to ensure no sign of the fusible alloy having been____________.

arbor press (13-37)

In the absence of a device specifically made for the job, an ______________ can be used with patience working sequentially around the wheel as close as possible to the bead.

steam (13-38)

Always avoid _________ cleaning of bearings.

firmly seated (13-39)

The bearing cup does not require removal for inspection; however, it must be ___________ in the wheel half boss.

manufacturer’s (13-40)

It is possible to dress out some corrosion according to the _________________ instructions.

wheel halves (13-41)

The balance weights are bolted to the ___________ and can be removed when cleaning and inspecting the wheel.

main wheels (13-42)

On most aircraft, each of the _______________ is equipped with a brake unit.

torque plate (13-44)

The other ends of the bolts are free to slide in and out of bushings in the _____________ , which is bolted to the axle flange.

rotating wheel (13-46)

The steel stators are keyed to the bearing carrier, and the copper or bronze plated rotors are keyed to the_____________.

alternating (13-37)

Often, these cylinders are supplied by two different hydraulic sources, ___________ every other cylinder from a single source.

pressure plate (13-48)

On most designs, brake lining material attached directly to the ________________ contacts the first rotor in the stack to transfer the motion of the piston(s).

torque bars

Tabs on the frames contain the tube and allow evenly spaced ______________ to be bolted in place across the tube between each brake block.

master cylinder (13-51)

Regardless of the set-up, it is the ______________ that builds up the pressure required for braking.

Mechanical (13-53)

A parking brake for this remote reservoir master cylinder brake system is a ratcheting ________________ device between the master cylinder and the rudder pedals.

spool valve (13-54)

As the pilot pushes harder on the pedal, a spring-loaded toggle moves a ____________ in the cylinder.

The key element in a power brake system is the ______________ , sometimes called a brake metering valve.

brake control valve (13-56)

single units (13-57)

Most brake control valves and metering valves function in a similar manner, although many are ____________________ that supply only one brake assembly.

back-up (13-58)

More complicated aircraft may involve another hydraulic system for __________ or use a similar alternation of sources and brake assemblies to maintain braking in case of hydraulic system or brake failure.

downstream (13-59)

To supply the lower pressure, a brake debooster cylinder is installed ______________ of the control valve and anti-skid valve.

lock (13-60)

If a wheel decelerates too fast, it is an indication that the brakes are about to ______ and cause a skid.

test switches (13-61)

The control unit may or may not have external _____________ and status indicating lights.

circuitry card (13-62)

Each wheel has its own identical ______________ to facilitate simultaneous operation.

one nozzle (13-63)

By moving the flapper closer to _____________ or the other, pressures are developed in the second stage of the valve.

wheel speed sensor

As a back-up and when the aircraft is on the ground with the strut not compressed enough to open the squat switch, a minimum ____________________ signal can override and allow braking.

anti-skid system

Built-in test circuits continuously monitor the ________________ and provide warning if a failure occurs.

beyond limits (13-66)

This wear must be monitored to ensure it is not worn _________________ and sufficient lining is available for effective braking.

gravity bleeding (13-67)

Brakes are bled by one of two methods: top down, _____________ or bottom up pressure bleeding.

opened (13-68)

The valve on the pressure tank hose is then _________ allowing pure, air-free fluid to enter the brake system.

hydraulic fluid

Seals in the brake system are designed for a particular_______________.

brake assembly (13-70)

Brake wear pads or linings must also be inspected for wear while the ________________ is removed from the aircraft.

dimensionally (13-71)

Pistons are also ________________ checked for wear limits specified in the maintenance data.

heat treatment (13-72)

Any weakness or loss of _________________ could cause the brake to fail under high-pressure braking.

warped disc (13-73)

A ______________ (s) in a multiple brake disc stack produces a condition wherein the brake is actually applied and removed many times per minute.

nominal (13-74)

They are used on fixed gear aircraft and are designated only by their ___________ overall diameter in inches.

tubeless (13-75)

Tires that are meant to be used without a tube have the word ___________ on the sidewall.

bead (13-76)

The ends of each ply are anchored by wrapping them around the _______ on both sides of the tire to form the ply turn-ups.

nylon cord fabric

These are layers of _______________ under the tread that strengthen the tread while protecting the carcass plies.

lower

Tire pressure measured with the aircraft on jacks or when the tire is not installed is _______ due to the larger volume of the inflation gas space inside of the tire.

landing surface (13-79)

While carcass damage due to overheating does not result, adherence to the ______________ is reduced.

limits (13-81)

Cuts, bruises, bulges, imbedded foreign objects, chipping, and other damage must be within ____________ to continue the tire in service.

square inch (13-82)

Deep chevrons that cause a chunk of the tread to be removed should not expose more than 1 _______________ of the reinforcing or protector ply.

sidewall cords (13-83)

If this extends to the_______________ , the tire must be removed from service.

primary source (13-84)

The wheel manufacturer’s maintenance information is the ___________________ for dismounting guidelines.

Overheated (13-85)

The bead area of the tire may sustain damage or have an altered appearance or texture on a tire that has been _______________ .

certified tire repair facility (13-86)

Nearly all tire repairs must be made at a ___________________________ equipped to perform the approved repair.

valve area (13-87)

The ______________ is prone to damage and should be inspected thoroughly.

serial number (13-88)

Typically, the tire _______________ is mounted to the outboard side of the assembly.

pass inspection (13-89)

The tube to be installed must also _____________ and must be the correct size for the tire and tire must be specified for the aircraft.

shimmy free operation (13-90)

While this is rarely specified by manufacturers, a well-balanced tire and wheel assembly helps provide ______________________ and reduces wear on brake and landing gear components, such as torque links.

paved surface (13-91)

Dual or multiple wheel main gear should be operated so that all tires remain on the _________________ so the weight of the aircraft is evenly distributed between the tires.

damaging condition (13-92)

Hydroplaning on a wet runway may be overlooked as a _____________________ for a tire.

static air (10-24)

The rate-of-climb indication in a digitally displayed instrument system is computed from _____________input to the ADC.

indicated airspeed (10-24)

The relationship between the ram air pressure and static air pressure produces the indication known as___________________.

ADC (10-25)

Digital flight instrument systems perform all of the calculations for true airspeed in the_______.

speed of sound (10-25)

It is very important to keep high-speed aircraft from traveling faster than the _________________if they are not designed to do so.

remote-sensing (10-26)

Placing sensors at the most suitable location on the airframe or engine and transmitting the collected data electrically through wires to the displays in the cockpit is a widely used method of _________________and indicating on aircraft.

transmitting (10-26)

A synchro system is an electric system used for _______________information from one point to another.

new position

Whenever the magnetic field changes direction, the permanent magnet and pointer realign with the ________________of the field.

AC power

Both operate in a similar way to the DC selsyn system, except that ________________is used.

directed into (10-29)

By locating the transmitter of a synchro system remotely, fluid pressure can be _______________ it without a long tubing run.

single-engine light aircraft (10-30)

Mechanical tachometer indicating systems are found on small, _________________________in which a short distance exists between the engine and the instrument panel.

lower maintenance (10-30)

Greater accuracy with _____________________is achieved through the use of electric tachometers.

main rotor (10-31)

A dual tachometer on a helicopter often shows the rpm of the engine and the rpm of the________________.

Indicates position of retractable landing gear.

Which of the following are some uses for a DC-selsyn system? Indicates cowl flaps or oil cooler door position. Indicates fuel quantity. Indicates position of wing flaps.

is imminent

Stall warning systems are generally designed to begin warning the pilot when a stall

trim position.

When an airplane's primary flight control surfaces are set for a particular phase of flight, such as landing or takeoff, the corresponding control-surface indicating system will show

rotor

The basic difference between an autosyn and a magnesyn indicating system is the