2.16 Loss of Communications - Aircraft Equipment

2.16.2 Describe the checks that should be followed when becoming aware of an aircraft communication system failure, including a check of:

(a) radio power source;

• master switch is on
• avionics switch is on
• circuit breakers/fuses are not popped or blown

(b) function settings (frequency, squelch and similar);

• correct frequency is selected
• squelch function and level is set correctly
• volume is not turned down too low
• correct comms box is selected

(c) microphone or headset.

• microphone and leads are correctly plugged in
• volume on the headset is up

2.16.4 Detail the actions to be taken when experiencing loss of communications in:

(a) controlled airspace;

5.2.2 The pilot of an aircraft operating under VFR should: 

(a) not enter controlled airspace, including control zones, unless complying with:

• a clearance already received and acknowledged; or
• published COM failure procedures for that aerodrome.

(b) divert to an unattended aerodrome and report arrival to ATS as soon as possible;

(c) if unable to divert to an unattended aerodrome:

• continue to operate transponder on code 7600; and
• enter the control zone via a published arrival procedure; or
• approach the aerodrome side-on to the main runway or runway-in-use, and carry out a standard overhead circuit joining procedure; and
• contact ATS as soon as possible after landing.