TM 1-1510-224-MTF
PROCEDURE
TROUBLESHOOTING
REFERENCE
AVIONICS FLIGHT CHECKS (CONT)
actual coordinates. Verify that INS position
indication is within 1250 feet of known location.
*4.
Audio control panel and interphone system -
Check each unit as follows:
(a)
Interphone functional check:
(1)
RADIO MON switches - OFF.
(2)
ICS switch - NORM.
(3)
Transmitter
selector
switches
on
pilot’s and copilot’s audio control
panel - ICS. This will allow the pilot to
talk to the copilot by pressing a
microphone switch and speaking into
microphone
or
vice
versa
from
copilot’s position.
(4)
Microphone switches - Actuate one at
a time and speak into appropriate
microphone. Side tone should be
heard in other headset.
(5)
ICS switch - HOT MIC. Verify that
crew is able to converse on intercom
without
depressing
microphone
switches.
(6)
VOL control - Check for function.
(b)
receiver and transmitter facilities - Check as
follows:
K1-2
4-12
