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Surfaces controlled by a two-axis autopilot

Aviation Mechanic Airframe (AMA) practice question 3 of 26 on Communications, Light Signals, and Runway Lighting Systems. ACS element AM.II.I.K16 · difficulty: standard. Want to answer it in a timed quiz? Use the Aviation Mechanic Airframe (AMA) practice mode.

Question bank updated 2026-09-22

QUESTIONAn aircraft is fitted with a two-axis autopilot system. Which flight control surfaces does that autopilot move?

  1. AThe ailerons, elevators, and rudder.
  2. BThe ailerons only.
  3. CThe ailerons and elevators.
Show the answer and explanation

Correct answer: C. The ailerons and elevators.

  • A — incorrect Controlling all three of those surfaces describes a three-axis autopilot.
  • B — incorrect An autopilot that manages the aircraft around only one axis controls the ailerons and is called a wing leveler.
  • C — correct Two-axis autopilot systems control the ailerons and elevators.

BACKGROUND

An automatic pilot system controls the aircraft without the pilot directly maneuvering the controls, maintaining attitude and direction and returning the aircraft to that condition when it is displaced. Autopilot systems provide for one-, two-, or three-axis control. Those that manage the aircraft around only one axis control the ailerons and are known as wing leveler systems, usually found on light aircraft. Two-axis systems control the ailerons and elevators, while three-axis autopilots control the ailerons, elevators and rudder. Two- and three-axis autopilot systems can be found on aircraft of all sizes.

STUDY TIP

Count axes against surfaces: one is ailerons, two adds elevators, three adds the rudder.

KEY POINTS

  • A single-axis autopilot controls the ailerons and is called a wing leveler.
  • A two-axis autopilot controls the ailerons and elevators.
  • A three-axis autopilot adds rudder control.

SOURCES

  • ama-airframe/ch10.txt "Autopilot Systems"
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SkyDrill is not affiliated with the FAA. This is an original practice item based on FAA-H-8083-31B Aviation Maintenance Technician Handbook – Airframe, and 14 CFR part 43. Regulations and handbooks are revised; confirm details against the current edition.