TrueNorth Avionics’ Simphonē Chorus cabin communications system received STC approval for installation on the Cessna Citation 560. The STC, developed and completed by Duncan Aviation in Battle Creek, Mich., includes TrueNorth’s Simphonē Chorus and SwiftBroadband 200 systems, as well as both wired and wireless handsets. TrueNorth said the STC applies to the Chorus and Duo editions of the system, which add both voice and data/Wi-Fi capabilities to the cabin.