Assembly and rigging

Question 1

What are three types of commonly used flight control systems? Or What are three mechanical methods used to actuate flight control systems?

Answer 1

They are the cable, the push-pull tube, and the torque tube systems.

Question 2

What is used in large metal aircraft to keep control cable tension within acceptable limits?

Answer 2

cable tension regulators in
the control cable systems.

Question 3

What is a fairlead?

Answer 3

It is a cable guide

Question 4

How much cable deflection is acceptable due to a fairlead?

Answer 4

3°.

Question 5

Where does breakage of control cables occur most frequently?

Answer 5

where cables pass over pulleys and through fairleads.

Question 6

Which flight control surfaces are considered the primary group?

Answer 6

The elevators, the ailerons, and the rudder.

Question 7

Which flight controls are considered the secondary group?

Answer 7

The trim tabs, spring tabs, wing flaps, servo tabs, and the anti-servo tabs.

Question 8

Which flight controls are in the auxiliary group?

Answer 8

This group consists of the flaps, speed brakes, spoilers, slats, leading edge flaps, and slots.

Question 9

How do wing flaps affect landing speed and approach angle of an aircraft?

Answer 9

The use of flaps increase the camber of a wing and therefore the lift of the wing, making it possible
for the speed of the aircraft to be decreased without decreasing the lift produced by the wing.

Question 10

What is a balance tab?

Answer 10

It is an auxiliary control with fixed linkage that is designed in such a way that when the primary
control surface is moved the tab moves in the opposite direction.

Question 11

What is a trim tab?

Answer 11

It is an auxiliary control attached to the trailing edge of the primary control surface that is positioned
by movement of a cockpit control to reduce the workload on the pilot in maintaining a desired flight attitude.

Question 12

What is the purpose of the collective pitch control in a helicopter?

Answer 12

It varies the lift of the main rotor blades simultaneously.

Question 13

Why is it important for the blades of a helicopter rotor system to be tracked?

Answer 13

To reduce vertical vibrations.

Question 14

What is the most efficient way to check a helicopter rotor for dynamic balance?

Answer 14

The use of a balance/analyzer computer.

Question 15

What unit on a helicopter is used to compensate for torque created by the main rotor?

Answer 15

tail rotor.

Question 16

What control operates the helicopter tail rotor?

Answer 16

Foot pedals.

Question 17

What are the three axes of an aircraft

Answer 17

longitudinal, lateral, and vertical.

Question 18

When installing an aircraft bolt what precaution would you take regarding the position of the bolt?

Answer 18

Where possible, the bolt head should be positioned on top when a bolt is installed vertically, and the
bolt head should be forward when it is installed horizontally. In these positions the bolt is less likely
to slide out if the locking device fails.

Question 19

How is the propeller torque corrected for during assembly and rigging some single engine aircraft?

Answer 19

Some aircraft have the leading edge of the vertical stabilizer offset to the longitudinal center line to
counteract engine torque.

Question 20

What reference publications should be used to rig aircraft including the control system?

Answer 20

You should refer to the Aircraft Specifications or Type Certificate Data Sheets issued by the FAA,
and also to the Maintenance Manual issued by the manufacturer.

Question 21

What are vortex generators?

Answer 21

Small, low-aspect-ratio airfoils mounted on the upper surface of wings.

Question 22

What is a servo tab?

Answer 22

A cockpit controlled adjustable tab attached to the trailing edge of a primary control surface.

Question 23

What items must be known before using a typical cable rigging chart?

Answer 23

The size of the cable and the outside temperature.

Question 24

Where can you find instructions for jacking one wheel of an aircraft to change a tire?

Answer 24

The aircraft maintenance manual.

Question 25

Why do control surfaces need to be statically balanced?

Answer 25

Because an out of balance control surface can cause severe flutter(trouble).

Question 26

What is the purpose of a rotorcraft cyclic pitch control?

Answer 26

It changes the pitch of each main rotor blade during a cycle of rotation.

Question 27

What is the purpose of a rotorcraft collective pitch control?

Answer 27

It varies the lift of the main rotor blade simultaneously.

Question 28

What are cable tension regulators?

Answer 28

They are mechanical devices that automatically maintain cable tension.

Question 29

What tools are primarily used to check control surface travel?

Answer 29

Protractors, rigging fixtures, contour templates, and rulers.

Question 30

What is spring tab?

Answer 30

It is an auxiliary control that aids in moving the primary control. Thus, aerodynamic forces acting on the tab assist in moving the primary control surface.

Question 31

Name four high-lift devices.

Answer 31

Leading edge flaps, slots, slats, and trailing edge flaps.

Question 32

What is the purpose of vortex generators?

Answer 32

To provide for limit layer air control.