FREE Airframe Mechanic Flight Controls & Rigging Questions and Answers

Question 1

During a flight control rigging check, a technician finds that the aileron up-travel is within limits, but the down-travel is consistently 2 degrees less than specified.
What is the most likely cause of this discrepancy?

Accepted Answer

Improper adjustment of the aileron control stops.

Answer

Incorrect cable tension on the aileron control cables.

Answer

Worn bellcrank bearings in the control system.

Answer

Excessive play in the control column universal joints.

Question 2

A flight control system utilizes push-pull rods for transmitting control inputs. Which of the following conditions would indicate a need for immediate inspection and potential replacement of a push-pull rod?

Accepted Answer

Evidence of fretting corrosion at the rod end bearings.

Answer

Slight discoloration of the rod's paint due to environmental exposure.

Answer

Minor scratches on the rod's surface that do not penetrate the protective coating.

Answer

A small amount of grease leakage from the rod end fitting.

Question 3

Which of the following describes the primary function of a trim tab on a primary flight control surface?

Accepted Answer

To provide aerodynamic balance, reducing control forces required by the pilot.

Answer

To increase the effectiveness of the main control surface during high-speed flight.

Answer

To physically lock the main control surface in a neutral position during ground operations.

Answer

To automatically adjust the main control surface for gusts, improving stability.

Question 4

A technician is performing a control cable tension check on an aircraft in a cold hangar (10°C / 50°F). The maintenance manual specifies a tension range for 20°C (68°F). How should the technician adjust the measured tension values?

Accepted Answer

The measured tension will be lower than actual due to cold, so add a correction factor.

Answer

The measured tension will be higher than actual due to cold, so subtract a correction factor.

Answer

No adjustment is needed as cable tension is not significantly affected by temperature.

Answer

The technician must warm the aircraft to 20°C before performing the check.

Question 5

When rigging an aircraft elevator, what is the significance of ensuring both up and down travel are checked against specifications?

Accepted Answer

To ensure the aircraft can achieve its designed pitch control authority and avoid over-control.

Answer

To verify the proper operation of the autopilot servo system.

Answer

To confirm the structural integrity of the elevator hinges under load.

Answer

To prevent overstressing of the control cables during extreme maneuvers.

Question 6

Which of the following best describes the purpose of a fairlead in an aircraft control cable system?

Accepted Answer

To guide the control cable and prevent it from rubbing against aircraft structure.

Answer

To connect two control cables together to extend their length.

Answer

To provide a means of adjusting cable tension during rigging.

Answer

To absorb shock and vibration in the control cable system.

During a flight control rigging check, a technician finds that the aileron up-travel is within limits, but the down-travel is consistently 2 degrees less than specified.What is the most likely cause of this discrepancy?

During a flight control rigging check, a technician finds that the aileron up-travel is within limits, but the down-travel is consistently 2 degrees less than specified.
What is the most likely cause of this discrepancy?