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 TM 55-1510-218-MTF
PROCEDURE
TROUBLESHOOTING
REFERENCE
AVIONICS FLIGHT CHECKS (CONT)
h. Check autopilot indicated air-
speed hold function as fol-
lows.
(1) Fly aircraft to test air-
speed.
(2) Airspeed hold switch-
indicator (autopilot mode
selector panel) - Press on.
(3) Aircraft should maintain
airspeed that was being
flown at the time IAS
hold switch was pressed.
i. Check roll command function
of autopilot as follows:
(I) Turn control knob (au-
topilot pitch-turn control
panel) - Turn to L and R
and verify that autopilot
turns aircraft left or right
respectively.
*4.
K1-2
Audio control panel and inter-
phone system - Check each unit
as follows:
a. Interphone functional check:
(1) Receiver selector switches
- OFF.
(2) Transmitter
selector
switches on pilot's and co-
pilot's audio control panel
- INTPH. This will allow
the pilot to talk to the co-
pilot by passing a micro-
phone switch and speak-
ing into microphone or
4-14
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