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Purpose of an audio panel

Aviation Mechanic Airframe (AMA) practice question 23 of 26 on Communications, Light Signals, and Runway Lighting Systems. ACS element AM.II.I.K4 · difficulty: recall. Want to answer it in a timed quiz? Use the Aviation Mechanic Airframe (AMA) practice mode.

Question bank updated 2026-09-22

QUESTIONWhat is the function of an audio panel installed in an aircraft flight deck?

  1. AIt amplifies the signal sent from each radio to its antenna.
  2. BIt supplies backup electrical power to the radios.
  3. CIt consolidates radio selection controls into one unit.
Show the answer and explanation

Correct answer: C. It consolidates radio selection controls into one unit.

  • A — incorrect Amplification of the signal sent to the antenna happens in the transmitter's own amplifier circuits, not in the selection panel.
  • B — incorrect The audio panel selects and routes radio functions; it is not a power source for the avionics.
  • C — correct An audio panel or digital tuner consolidates various communication and navigation radio selection controls into a single unit.

BACKGROUND

An aircraft carries numerous communication and navigation devices, many of which use radio waves and must be tuned to a desired frequency. As a flight progresses, retuning and changing from one piece of equipment to another can occur frequently. An audio panel or digital tuner consolidates the various communication and navigation radio selection controls into a single unit so the pilot can select and use them from one place. On a business class aircraft, a digital tuner does the same and also allows the frequency of each device to be tuned from that same panel. Marker beacon lights are commonly incorporated into the audio panel of a general aviation aircraft.

STUDY TIP

Think of the audio panel as a switchboard, not an amplifier or a power supply; its job is selection and routing.

KEY POINTS

  • An audio panel consolidates communication and navigation radio selection controls into one unit.
  • A digital tuner adds the ability to tune each device's frequency from the same panel.
  • Marker beacon indicator lights are often built into the audio panel of a light aircraft.

SOURCES

  • ama-airframe/ch11.txt "Digital Tuners & Audio Panels"
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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.