Engaging autopilot. AP mode select
panel ENG/DIS switch to ENG position.
When the autopilot is engaged,
indicated by the lighted YAW
The autopilot and flight director are coupled when
both units are engaged. When coupled, the autopilot
accepts guidance commands from the flight director.
When the flight director is not engaged, the autopilot
accepts pitch and roll commands from the pitch/turn
control knobs as selected by the pilot.
The autopilot may be engaged in any reasonable
attitude and in either the coupled or uncoupled mode.
The autopilot will smoothly acquire the command
attitude. When uncoupled, the autopilot will maintain
the bank and pitch attitude at the time of engagement.
(a) The autopilot may be disengaged by
any of the following:
2. Pressing TEST button on AP mode
3. Pressing GO AROUND switch
on left power lever.
4. Pressing control wheel DISC switch
to AP YD position.
(b) The following functions will cause
the autopilot to automatically disengage:
1. Vertical gyro failure.
2. Directional gyro failure.
3. Autopilot power or circuit failure.
4. Torque limiter failure.
1. To change flight functions, press the
desired mode button on the AP
mode selector panel. The button
will illuminate along its edges and
autopilot annunciator lights on the
instrument panel will illuminate,
indicating the respective modes in
autopilot pitch control for climbing
or descending. Movement of the
pitch control establishes a pitch rate
displacement. If any vertical
mode button has been selected, it
will automatically release when the
pitch control knob is rotated.
3. When HDG mode is selected, the
autopilot will command the aircraft
to execute a turn then maintain the
heading set by the heading marker.
4. Use the autopilot turn control to
command a roll rate when the
autopilot is engaged. At the time
control is returned to detent, the
autopilot maintains the bank angle
(up to approximately 30 degrees).
Rotating the turn control when the
autopilot is engaged and a lateral
mode is selected will cause the
selected lateral modes to release.
Control wheel synchronization. The
PITCH SYNC & CWS button on the pilot's control wheel
can be used instead of the pitch/turn control to establish
the aircraft in a desired attitude. Depressing this button
causes autopilot elevator and aileron servos to
disengage from the control surfaces. The pilot then flies
the aircraft manually to a desired 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
pressed. Upon release of the PITCH SYNC & CWS
button, the autopilot will couple to the previously
selected lateral mode.
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.