Lost of Comms under IFR
If a loss of communication occurs in IFR conditions, you must continue the flight according to the acronym “AVEenue of FAME”. Let’s go over the components of the acronym: A: Fly the assigned route as per last ATC clearance received. V: If being vectored, fly the direct route from point or radio failure to the fix, route, or airway specified in the vector clearance. E Fly the route that ATC has advised you to expect in a further clearance. F Fly the route filed on the flight plan. A Fly your last assigned altitude M Be aware of minimum altitude (MEA) for IFR operations E Fly the altitude ATC has told you to expect in a further clearance. Note that “AVEF” refers to the route, while “AME” refers to altitude. Once reached, you need to have a plan in place to leave the clearance limit. Be sure not to descend below MEA before being established on the approach. When experiencing a two-way radio failure, it is your responsibility to select an appropriate altitude for the particular route segment being flown; and to make any necessary altitude adjustments for subsequent segments. If you have received a “expect further” communication that contains a higher altitude than what is currently being flown at an upcoming waypoint or time, maintain either the last assigned altitude or MEA (whichever is higher) until you reach that time or fix. Climb to the expected altitude upon reaching the time or fix. If the “expect further” communication contains a lower altitude, either the last assigned or MEA should be maintained (whichever is higher) until the time or fix that was specified to leave your clearance limit is reached. If below Emergency Safe Altitude “ESA” (within 25 – 100 miles) or the Minimum Safe Altitude “MSA” (within 0 – 25 miles) and not established on an approach; make a climb above the relevant safe altitude until you are established on the approach. If you are given an altitude to expect and make the climb to that altitude before the radio failure occurs, it is no longer “expected”, and the last assigned altitude or MSA should be flown; once again, whichever is higher. If receiving an EFC containing a lower altitude, maintain either the assigned altitude or MEA (whichever is highest) until the designated time/fix is reached. Leaving the Clearance Limit: Once reaching the Initial Approach Fix, commence the descent and approach as close as possible to the expected “further clearance time” if one has been issued, or as close as possible to the ETA calculated from the flight plan or amended with ATC if a further clearance time has not been issued. If no time or fix was received, start the descent as described above over the clearance limit; and proceed to the fix from which the approach begins. While in the Pattern If comms are lost in the pattern, look for the green light gun signal from the tower (signifying you are cleared to land). If no lights are received by the tower on your first approach, fuel permitting, go around. Land on the second approach if no light gun signals have been received from the tower. You can refresh on your light gun signals by viewing the picture above! Radar Approaches: Initiate lost communication procedures if no transmissions are received for 60 seconds while being vectored to final, 15 seconds while on ASR final approach, or 5 seconds while on PAR final approach. If unable to reestablish communication and maintain VMC, proceed with published IAP or previously coordinated instructions. Maintain the last assigned altitude or MSA (Whichever is higher, or ESA if beyond 25 NM) until established on an instrument approach. Be aware of where you are in relation to the missed approach point. You can climb, but don’t turn until you reach MAP. So What About IFR Lost Comms in the Real World? If you lose your comms while flying under IFR there are some commons sense steps you can take to ensure the best outcome possible for your flight. Lost Communications while in VFR Conditions: 14 CFR 91.185 is clear to say: “If the failure occurs in VFR conditions, or if VFR conditions are encountered after the failure, each pilot shall continue the flight under VFR and land as soon as practicable.” That means if you are in VMC or encounter VMC after you lose comms, squawk 7600 and proceed to land as soon as practicable under VFR conditions (basically land at the first airport that works for you safely and logically). The towered or non-towered airport does not matter, choose the best safe choice and land. Lost Communications while in IMC (Instrument Meteorological Conditions) Follow the steps outlined in the beginning of this article (AVEF-AME). But also use common sense…. Check your Mic and Headphone jack and ensure your headset is plugged in. Ensure you do not have a stuck mic (you may notice a TX annunciation on your radio if you do or hear the sidetone). Check the volume on your radio, and test the volume by turning of the squelch (pulling the volume knob or pressing the “SQ” button). It is rare to lose your entire radio all at once, did you recently touch any buttons or switches on the audio panel or intercom? If so, flip them back to previous positions. Try the last known frequency you were on. Try reaching another ATC facility on 121.5 (guard frequency). Transmit “Any station, your callsign, looking for name of ATC facility you are trying to reach” Alternatively you can transmit “In the blind your message, in the blind”. While “in the blind” is not something commonly heard on the radio, if an ATC facility hears it on guard or any other frequency they should know you are transmitting blindly hoping someone hears you, but you do not have two-way radio comms with any facility currently. “In the blind” does not refer to you being in IMC. If










