TM 1-1510-224-MTF
PROCEDURE
TROUBLESHOOTING
REFERENCE
AVIONICS FLIGHT CHECKS (CONT)
(c)
TURN control - Place in center (detent)
position.
(d)
AP ENGAGE switch - Press to engage.
(e)
Check autopilot heading preselection as
follows:
(1)
Autopilot HEADING selector knob (on
pedestal
extension)
-
Set
test
heading.
(2)
HDG switch-indicator (flight director
mode selector) - Press on.
(3)
Aircraft should automatically turn and
roll out on preselected heading.
(f)
Check altitude control and selection as
follows:
(1) Pitch
thumblewheel
(autopilot
controller) - Move UP and DN while
observing that aircraft and pitch trim
indicator respond properly.
(2)
V/L
pushbutton
selector
switch
(display controller) - Depress to select
VOR.
(3)
NAV switch-indicator (flight director
mode selector) - Depress on.
(4)
When the aircraft is within 10 degrees
of the selected radial,
4-8
