Page 68 - Communication IFR_Neat

transmitter okay or vice versa) or even a total failure of equipment. The
breakdown may be caused by interference or by wrong selection.

Actions

The most common reason for lack of communications is usually “finger trouble”.
Therefore you should check:

• Correct frequency selected

• Volume control not turned too low or squelch level too high

• Microphone/headset plugs fully home
• The aeronautical station is open

• You are within radio range

Radio Failure

It could be that your (or the other station) equipment’s malfunctioning. It is
possible that your receiver has failed but you are still transmitting satisfactorily.

In VMC and operating under VFR (visual flight rules) some aircraft still operate

with no radio fitted, therefore unless you need an ATC service there is no cause
for concern! However, if you do need a service (for example to join a traffic

pattern to land) then you should follow the GENERAL PROCEDURE outlined here:

• Attempt communication on another frequency.

• If these attempts fail, continue to transmit your message twice on
the designated requency.

• If you know that your receiver has failed, transmit reports (or positions)

at the scheduled times on the frequency n use.
Note: ICAO requirement states that “An aircraft which is receiving Air Traffic Control or Advisory
Service shall also transmit information regarding the intent on of the pilot-in-command with

respect to the continuation of the flight.”

Other radio failure
How else could you inform ATC of your radio failure?

SSR Code - squawk 7600

This code appearing on a radar screen informs the controller that the aircraft
concerned has radio problems.

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