3/17/2023 0 Comments Transmit failure![]() ![]() If communications are restored, you have isolated the problem to the first radio. Now try the second communications radio, assuming the aircraft that you're flying has two. (There are rare situations when you may wish to transmit on one frequency and listen on another-calling flight service when you must listen to their response over a VOR frequency is an example-but in most cases the mode is simplex, which means one frequency for two-way communications.) If the pilot has turned the wrong switch and inadvertently connected the microphone to one radio and the headphone/speaker to another, listening or transmitting will be in the blind. To effectively communicate, a microphone and a speaker or headset should be channeled to the same radio. While audio panel switches vary, two important audio panel functions should be clearly understood. The next most common pilot-induced fault is incorrectly set audio panel switches. At a nontowered airport you may ask for a radio check, and get an answer from unicom or another pilot on the frequency. Communicating with ground control at a towered airport confirms radio function. Most pilots check the radio on the ground before takeoff. Another good choice is an automated terminal information service (ATIS) or automated surface observation system (ASOS) frequency at a nearby airport. You can always tune to a busy frequency 123.0 and 122.8 MHz are good choices to check reception. If you transmit and do not hear an answer, don't assume that you have not transmitted (see "Learning Experiences: Lost Communications," p. The pilot forgets to turn up the volume or improperly sets the audio panel. Most lost communications are pilot-induced. Often the problem can be corrected in the air. A pilot should have a systematic method to determine what has failed and how to fix it. Loss of communication generally comes in one of three varieties: inability to transmit, loss of reception, and-rarely-both. It could happen 500 hours from now, or on your next solo flight-so you need to be aware of the possibility and be prepared to deal with it. There's a good chance that at some point in your aviation experience, you'll be faced with a loss of radio communications in the aircraft you're flying. ![]()
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