TM 55-1510-221-MTF
PROCEDURE
TROUBLESHOOTING
REFERENCE
G. AVIONICS FLIGHT CHECKS (CONT)
(2)
ICS switch - NORM
(3)
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 position.
(4)
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.
(5)
ICS switch - HOT MIC Crew should be
able to converse on intercom without
depressing microphone switches.
(6)
Volume control - Check for function
b.
Receiver and transmitter facilities - Check
as follows
(1)
Receiver volume controls - Turn all fully
counterclockwise.
(2)
Receiver switches (audio control panel)
- Push on one at a time and turn
clockwise to increase volume and
increase volume
4-22
