PROCEDURE TROUBLESHOOTING REFERENCE
AVIONICS FLIGHT CHECKS (CONT)
ICS switch - NORM.
Transmitter selector switches on pilot's and copilot's
audio control panel - INTPH. This will allow the pilot to
talk to the copilot by pressing a microphone switch and
speaking into microphone or visa-versa from copilot's
Microphone switches - Actuate one at a time and speak
into appropriate microphone. Side tone should be
heard and speech should be heard in other headset.
ICS switch - HOT MIC. Crew should be able to
converse on intercom without depressing microphone
Volume control - Check for function.
Receiver and transmitter facilities - Check as follows:
Receiver switches (audio control panel) - Push on one
at a time and turn clockwise to increase volume and