What was found
ELECTRIC TRIM ACTIVATION WAS KEYING RADIO AND PRESSING PTT SWITCH WAS DISCONNECTING AUTOPILOT. THE YOKE COIL CORD INSULATION WAS FALLING OFF OF 2 ADJACENT WIRES ALLOWING THE 2 CONDUCTORS TO TOUCH AND SHORT CIRCUIT. THE COIL CORD IS A CYGNET CA3934-24 INSTALLED 2 YEARS AGO WITH A GARMIN GFC600 INSTALLATION. THIS IS THE 2ND OCCURRENCE WE’VE SEEN WITH THE FAILED INSULATION ON CYGNET CA3934-24 COIL CORD AFTER BEING INSTALLED FOR 2 YEARS.