AVIONICS FLIGHT CHECKS (CONT)
actual coordinates. Verify that INS position
indication is within 1250 feet of known location.
Audio control panel and interphone system -
Check each unit as follows:
Interphone functional check:
RADIO MON switches - OFF.
ICS switch - NORM.
pilots and copilots audio control
panel - ICS. This will allow the pilot to
talk to the copilot by pressing a
microphone switch and speaking into
Microphone switches - Actuate one at
a time and speak into appropriate
microphone. Side tone should be
heard in other headset.
ICS switch - HOT MIC. Verify that
crew is able to converse on intercom
VOL control - Check for function.
receiver and transmitter facilities - Check as