Airframe · Lesson 21 of 40
Communications, Light Signals, and Runway Lighting Systems
How aircraft radios and antennas work, the navigation, surveillance and weather systems a technician installs and checks, ELT inspection and testing, autopilots, avionics installation rules, and the tower's light signals for aircraft on the ground.
12 min read
Last reviewed
Part of A&P Complete
This lesson is in the full course
- Explain radio wave bands, modulation, transmitters, receivers and antenna types, and calculate a half-wave antenna length
- Describe how VOR, ADF, ILS, DME, GPS, transponders, TCAS, ADS-B, radio altimeters and weather radar work
- Apply the inspection and test rules for transponders (14 CFR 91.413) and emergency locator transmitters
- Identify autopilot components and the checks made after autopilot maintenance
- Decide whether an avionics installation is a major or minor alteration and install equipment and antennas correctly