Assembly & Rigging Flashcards by Sophya Elkihel

Movement about the longitudinal axis (roll) in a helicopter is effected by movement of the

Cyclic pitch control

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If control cables are adjusted properly and the control surfaces tend to vibrate, the probable cause is

Worn attachment fittings

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If the control stick of an aircraft with properly rigged flight controls is moved forward and to the right, the left aileron will move

Down and the elevator will move down.

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A tension regulator in the flight control cable system of a large all-metal aircraft is used primarily to

Retain a set tension

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Excessive wear on both of the sides of a control cable pulley groove is evidence of

Pulley misalignment

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In rotorcraft external-loading, the ideal location of the cargo release is where the line of action passes

Through the center of gravity at all times.

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An airplane which has good longitudinal stability should have a minimum tendency to

Pitch

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Aircraft flight control trim systems must be designed and installed so that the

Pilot can determine the relative position of the trim tab from the cockpit.

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The purpose in checking main rotor blade tracking is to determine the

Relative position of the blades during rotation.

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The vertical flight of a helicopter is controlled by

Collective pitch changes

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Which statement is correct concerning torque effect on helicopters?

Torque direction is the opposite of rotor blade rotation.

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Where is the buttock line or buttline of an aircraft?

A width measurement, left or right of, and parallel to, the vertical center line.

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When a fiber or nylon insert-type, self-locking nut can be threaded on a bolt or stud through the insert with only the fingers, it should be

Rejected

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If the control stick of an aircraft with properly rigged flight controls is moved rearward and to the left, the right aileron will move

Down and the elevator will move up

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if the vertical fin of a single-engine, propeller-driven airplane is rigged properly, it will generally be parallel to

The vertical axis but not the longitudinal axis

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Which is an acceptable safety device for a castle nut when installed on secondary structures?

Cotter pin

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Which statement concerning the 100-hour inspection of an airplane equipped with a push-pull tube-type control system is true?

The threaded rod ends should be checked for the amount of thread engagement by means of the inspection hole provided.

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The elevators of a conventional airplane are used to provide rotation about the

Lateral axis

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Main rotor blades that do not cone by the same amount during rotation are said to be out of

Track

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Improper rigging of the elevator trim tab system will affect the balance of the airplane about its

Lateral axis

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Other than the manufacturer maintenance manual what other document could be used to determine the primary flight control surface deflection for an imported aircraft that is reassembled after shipment?

Aircraft type certificate data sheet

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When used in close proximity to magnetic compasses, cotter pins are made of what material?

Corrosion resisting steel

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(Refer to Figure 8.) Identify the cable that is used in primary control systems and in other places where operation over pulleys is frequent

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Rigging and alignment checks should not be undertaken in the open. However, if this cannot be avoided, the aircraft should be positioned with the

Nose into the wind

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The cable-operated control system of an all-metal aircraft, not incorporating a temperature compensating device, has been rigged to the correct tension in a heated hangar. If the aircraft is operated in very cold weather, the cable tension will

Decrease when the aircraft structure and cables become cold.

The angle of incidence is that acute angle formed by

A line parallel to the wing chord and a line parallel to the longitudinal axis of the aircraft.

During inspection of the flight control system of an airplane equipped with differential-type aileron control, side to side movement of the control stick will cause

Each aileron to have a greater up travel (from the streamlined position) than down travel.

If the travel of an airplane's controls is correct but the cables are rigged exceptionally tight, what probable effect will this have when flying the airplane?

The airplane will be heavy on the controls.

Proper wing twist in a sheet metal constructed wing can usually be checked by utilizing a

Bubble level and special fixtures described by the manufacturer.

Where is fuselage station No.137 located?

137 inches aft of the zero or fixed reference line.

Why is it generally necessary to jack an aircraft indoors for weighing?

So that air currents do not destabilize the scales.

Fairleads should never deflect the alignment of a cable more than

3 degrees.

The universal propeller protractor can be used to measure

Degrees of flap travel

Washing-in the left wing of a monoplane, for purposes of rigging corrections after flight test, will have what effect on the lift and drag of that wing?

Both drag and lift will increase due to increased angle of attack.

If a pilot reports that an airplane flies left wing heavy, this condition may be corrected by

Increasing the angle of incidence of the left wing, or decreasing the angle of incidence of the right wing, or both.

As the angle of attack of an airfoil increases, the center of pressure will

Move toward the leading edge.

(Refer to Figure 9.) When the outside air temperature is 80 degrees F, select the acceptable 3/16 cable tension range

117 pounds minimum, 143 pounds maximum

Differential control on an aircraft system means that

The up travel is more than the down travel

What nondestructive checking method is normally used to ensure that the correct amount of swaging has taken place when installing swaged-type terminals on aircraft control cable?

Use a terminal gauge to check the diameter of the swaged portion of the terminal.

The auxiliary (tail) rotor of a helicopter permits the pilot to compensate for and/or accomplish which of the following?

Torque and directional control

Stability about the axis which runs parallel to the line of flight is referred to as

Lateral stability

Where would you find precise information to perform a symmetry alignment check for a particular aircraft?

Aircraft service or maintenance manual

A helicopter in forward flight, cruise configuration, changes direction by

Tilting the main rotor disk in the desired direction

Buffeting is the intermittent application of forces to a part of an airplane. It is caused by

An unsteady flow from turbulence

What is the purpose of the free-wheeling unit in a helicopter drive system?

It disengages the engine from the main rotor when engine RPM is less than rotor RPM

Which should be accomplished before jacking an aircraft?

Install critical stress panels or plates

One purpose of the free wheeling unit is required between the engine and the helicopter transmission is to

Automatically disengage the rotor from the engine in case of an engine failure.

The chord of a wing is measured from

Leading edge to trailing edge

How are changes in direction of a control cable accomplished?

Pulleys

Movement about the lateral axis (pitch) in a helicopter is effected by the movement of the

Cyclic pitch control

The acute angle formed by the chord line of a wing and the relative wind is known as the

angle of attack

When inspecting a control cable turnbuckle for proper installation, determine that

The safety wire ends are wrapped a minimum of four turns around the terminal end shanks.

The purpose of the vertical fin is to provide

Directional stability

What is the smallest size cable that may be used in aircraft primary control systems?

1/8 inch

What type of flap system increases the wing area and changes the wing chamber?

Fowler flaps

The purpose of wing slats is to

Reducing stalling speed

An airplane's center of lift is usually located aft of its center of gravity

So that the airplane will have a nose-heavy tendency.

Placing a piece of cloth around a stainless steel control cable and running it back and forth over the length of the cable is generally a satisfactory method of inspecting for

Broken strands

The angle of incidence of an airplane at rest

Does not change when in flight

An airplane that has a tendency to gradually increase a pitching moment that has been set into motion has

Poor longitudinal stability

Movement of the cockpit control toward the nose down position during a ground operational check of the elevator trim tab system will cause the trailing edge of the trim tab to move in which direction?

Upward regardless of elevator position

When installing a castle nut, start alignment with the cotter pin hole at the

Minimum recommended torque plus friction drag torque

The dihedral angle of a wing may be measured by placing a straight edge and level protractor on the

Front spar

Where does the breakage of control cable wires occur most frequently?

Breakage usually occurs where cables pass over pulleys and through fairleads.

After repairing or re-covering a rudder, the surface should be rebalanced

To manufacturer's specification

Movement of an airplane along it's lateral axis (roll) is also movement

Around or about the longitudinal axis controlled by ailerons.

A reduction in anti-torque thrust will cause the

Tail to pivot in the direction of torque rotation around the main rotor axis.

A universal propeller protractor used to measure the degrees of aileron travel should be zeroed

With the aileron in the NEUTRAL position

In a hovering helicopter equipped with a tail rotor, directional control is maintained by

Varying the pitch of the tail rotor blades

If the right wing of a monoplane is improperly rigged to a greater angle of incidence when designated in the manufacturer's specifications, it will cause the

Airplane to be off balance both laterally and directionally.

If a single-rotor helicopter is in forward horizontal flight, the angle of attack of the advancing blade is

Less than the retreating blade

An airplane is controlled directionally about its vertical axis by the

Rudder

Wing dihedral, a rigging consideration on most airplanes of conventional design, contributes most to stability of the airplane about its

longitudinal axis

The correct dihedral angle can be determined by

Using a dihedral board and bubble level along the front spar of each wing

Very often, repairs to a control surface require static rebalancing of the control surface. Generally, flight control balance condition may be determined by

The behavior of the trailing edge when the surface is suspended from its hinge points.

The primary purpose of stall strips is to

Stall the inboard portion of the wings first.

If all instructions issued by the swaging tool manufacturer are followed when swaging a cable terminal, the resultant swaged terminal strength should be

The full rated strength of the cable.

With which system is differential control associated?

Aileron

When the lift of an airfoil increases, the drag will

Also increase

The purpose of spring tabs or servo tabs is to

Assist the pilot in moving the control surfaces.

What physical factors are involved in the aspect ratio of airplane wings?

Span and chord

The vast majority of aircraft control cables are terminated with swaged terminals, that must be

Checked with a go-no-go gauge before and after, to show compliance with the manufacturer's requirements after the swaging operation.