AUTOPILOT
AIRPLANE
OPERATIONS
MANUAL
2-19-10
Page
6
Code
01
REVISION 36
AOM-145/1114
The mode will be canceled or inhibited if any of the following
conditions occur:
Pressing the NAV button.
Selecting HDG mode.
Changing the displayed NAV source on the PFD.
Changing the displayed heading source on the PFD.
When the displayed heading is invalid.
When the lateral steering command is invalid.
Pressing the Go Around button.
Turn Control Knob out of detent with autopilot engaged.
VERTICAL MODES
Vertical modes are those modes related to pitch control. Due to the
necessity of maintaining the wings leveled during Go Around, this
vertical maneuver may also be considered as a lateral mode.
PITCH HOLD MODE
The Pitch Hold mode is the default mode that controls the airplane
when no other Flight Director mode is selected.
The Pitch Hold mode is synchronized to the existing pitch attitude and
provides an error signal to the command bars and autopilot function.
By pressing the Touch Control Steering Button (TCS), the pilot may
manually change the pitch attitude and then allow the system to
resynchronize to the new attitude when the button is released.
Should the autopilot be engaged and the Flight Director is in the pitch
hold mode, pitch attitude reference can be changed by rotating the
pitch control wheel on the pitch and turn controller.
The pitch control wheel allows continuous variable rates and
amplitudes of the pitch reference. A PIT label is displayed on the PFD
to indicate mode engaged.
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