Radio Communication Failure at Controlled Airports

Troubleshooting Radio Failure

When radio failure occurs at a controlled airport, the first step is systematic troubleshooting. Check frequency selection, radio volume, headset connections, and power sources. Try alternative frequencies, including the previous ATC frequency, and attempt to contact other aircraft or stations. If possible, use a second radio or headset.

Standard Procedures for Lost Comms

If communication cannot be restored, set the transponder to 7600 to indicate radio failure. Attempt to transmit blind, stating your intentions twice on the assigned frequency and, if necessary, on 121.5 MHz. If you can receive but not transmit, follow ATC instructions and confirm by complying with heading or altitude changes. If you can transmit but not receive, prefix transmissions with "TRANSMITTING BLIND DUE TO RECEIVER FAILURE" and repeat the message.

Actions in the Traffic Pattern

In the aerodrome traffic circuit, continue to follow the last ATC clearance and watch for visual signals from the control tower. Maintain heightened vigilance for other traffic and be prepared to yield.

VFR and IFR Considerations

For VFR flights, if able to remain in VMC, land at the nearest suitable aerodrome and report arrival as soon as possible. For IFR flights, procedures differ depending on weather and airspace. In VMC, continue visually and land safely. In IMC, follow lost comms procedures: maintain last assigned level for seven minutes, then proceed according to the flight plan.

Frequency Use in Urgency

If no contact can be established, use 121.5 MHz, the international distress frequency, to attempt communication with ATC or other aircraft.