Just a heads up,I suspect this is a known issue by ACES.When using the shared cockpit ant voice communications to your co-pilot is constantly broadcasted to the tower and possibly other players also. This is not normal or realistic so it looks like sharing a cockpit in multiplayer is not working right in terms of ATC and tower.Peter

PeterAre you sure you are NOT pressing the PPT key ( CAPSLOCK ) when communicating with your co-pilot.The Pilot-to-CoPilot Communication is an INTERCOM (like in a real aircarft).... you just TALK .. the intercom mic is "live" the whole time.Do NOT press CAPSLOCK to talk to your co-pilot. If you do, you will also TRANSMITTING on your "active" Radio Frequency.Geoff