I'm in the process of upgrading all our VHF radios and the local regulator has asked us to follow the guidance/recommendations from ICAO, as we have more or less cancelled many of our local rules. The radios will be used for voice only (including Volmet and ATIS).

What do the ICAO recommendations/procedures say about installing new air-to-ground VHF radios? Do they need to be tested by a test flight? Is there a difference if it is a new installation with new radios and new antenna, versus new radio types but with the same antenna, same frequency and same power output?

  • 2
    $\begingroup$ Welcome to aviation.SE! In case ICAO has no specific guidance (or no one here knows), would it be helpful to get an answer for a particular country or regulator? If so, you can edit your question to add that. $\endgroup$
    – Pondlife
    Sep 9, 2016 at 15:17
  • $\begingroup$ In case that matters, does your question include equipment used for data transfer (VDL)? $\endgroup$
    – mins
    Sep 10, 2016 at 7:41
  • $\begingroup$ So your local regulator is making you do their job for them? $\endgroup$ Jul 5 at 15:08

2 Answers 2


Avionics shops almost never test VHF radios in flight. They are almost always tested on the ground with test equipment. The only time I can think of an in-flight test being required is if the technician is trying to troubleshoot an intermittent problem that only happens in flight (such as a faulty connector in the vibration-rich environment of a military transport helicopter).


You can test the VHF radios and any Avionics systems following the AC 25-7D.


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