TM 55-1510-220-10
attitude, releases the PITCH SYNC & CWS button to re-
engage the servos, and the autopilot holds the established
attitude.
The ALT and IAS mode will immediately disengage (if
selected) when the PITCH SYNC & CWS button is coupled
to the HDG, NAV or B/C modes. Upon release of the PITCH
SYNC & CWS button, the autopilot will couple to the
previously selected lateral mode.
NOTE
The APPR mode will not disengage
when the PITCH SYNC & CWS
button is depressed. When the button
is released, the aircraft will return -to
the localizer course and glideslope.
j.
Before takeoff.
1.
Heading marker (pilot's HSI) Set to runway
heading.
2.
Heading switch (autopilot mode selector
control panel, fig. 3-20) Press. Do not
engage autopilot.
3.
Pitch steering bar Set for desired initial climb
attitude using the pitch control thumbwheel.
k.
Takeoff. Pressing the PITCH SYNC & CWS switch
on the control wheel will provide pitch synchronization and
the cross-pointers on the flight director indicator will
command flight to the pitch attitude that existed when the
PITCH SYNC & CWS switch was pressed.
l.
Climbout.
1.
Establish climb profile.
2.
Autopilot engage switch (autopilot mode
selector control panel, fig. 3-20) ENG (above
200 feet AGL).
3.
Airspeed hold switch (autopilot mode selector
control panel) Press (if desired).
4.
Heading knob (pilot's HSI) Move heading
marker as required for heading changes.
m.
Cruise altitude.
1.
Vertical speed Reduce to approximately 500
feet per minute (just before reaching cruise
altitude).
2.
Altitude hold switch (autopilot mode selector
control panel, fig. 3-20) Press (upon reaching
cruise altitude).
n.
VOR Operation.
(1)
To establish aircraft on a desired VOR radial,
perform the following:
1.
VOR receiver Tune appropriate
frequency.
2.
Course knob (pilot's HSI) Set desired
radial to or from station (shown in
COURSE window).
3.
Heading knob (pilot's HSI) Set desired
intercept angle under heading marker.
(The intercept angle with respect to the
radial may be any angle of 900 or less).
4.
Navigation switch (autopilot mode
selector control panel, fig. 3-20) Press.
Observe illumination of NAV ARM
annunciator light.
5.
Navigation capture annunciator light
(autopilot/flight director annunciator
panel, fig. 3-22) Monitor. At point of
capture, NAV CAP annunciator will
illuminate.
NOTE
Except as described below, do not
select a different VOR frequency,
TACAN channel, or course, once a
course and intercept have been
programmed or capture achieved. To
select
a
different
course
or
VOR/TACAN frequency, return to
the HDG mode, select the course or
frequency, return to the NAV mode,
then reset the desired course.
(2)
To change course over a VOR station.
To change course over a VOR station while operating in
NAV mode, if course change is less than 300: Course knob
(pilot's HSI) Set desired radial in COURSE window.
(3)
Changing course over a VOR station. To
change course over a VOR station while operating in NAV
mode, if course change is greater than 30°:
1. Heading knob (autopilot mode selector
control panel, fig. 3-20) Set desired
intercept heading under heading
marker.
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