Century 4000 Operating Controls; Autopilot On-Off; Master Disconnect/Trim Interrupt - Century 4000 Pilots Operating Manual

The MODE PROGRAMMER push-button switches are backlighted and the control panel light dimmer
switch provides dimming.
The MODE ANNUNCIATOR light intensity is controlled automatically by a self-contained ambient light
level sensor; this feature provides optimum Mode Annunciator light level for all cockpit conditions. The
Century 4000 Autopilot is activated with the Aircraft Master switch and operates in a low power state until
the autopilot operation is desired. Mode selection is made by pushing the desired mode switch on the
Mode Programmer. The selected mode will be illuminated on the Mode Annunciator.
*A separate Trim Master switch is located on the Control Panel. Autotrim function is activated by the
Autopilot Engage switch.

AUTOPILOT ON-OFF

Autopilot engagement and disengagement is accomplished by pressing the AP switch on
the top left side of the Programmer. The Autopilot will engage in the HDG mode and the
ATT mode will also be present when engaged and the autopilot will synchronize to the
existing aircraft pitch attitude.
In HDG mode the aircraft will track the heading selected on the DG or HSI. In NAV,
APR, or REV modes the aircraft will intercept and track any properly programmed radio-
defined course. Instructions for proper radio setup in these modes are included in this
manual.
In ATT mode the autopilot will synchronize to the aircraft pitch attitude upon engagement.
In ALT mode the aircraft will synchronize to the indicated altitude present at the time of engagement.
The autopilot may be disengaged by pressing the AP DISC switch on the
control wheel trim switch; or by pressing the Master Disconnect/Trim Interrupt
switch, on the control wheel; or by interrupting power at the Aircraft Master
switch. Disengagement causes the AP light to flash for 5 seconds.
MANUAL ELECTRIC TRIM - With the Aircraft and Trim Master switches on, a
manually operated electric trim function is activated by the control wheel trim
switch. This switch serves a dual function:
1. Disengage the Autopilot.
2. Activate manual electric trim.
Moving the red portion of the trim switch forward or aft will cause autopilot disengagement. Moving both
parts of the trim switch forward or aft simultaneously will disengage the autopilot and cause the trim to run
up or down.
MASTER DISCONNECT/TRIM INTERRUPT - Many Century 4000 autopilots incorporate an additional
switch on the control wheel (usually a red button). Pressing this button will disconnect the Century 4000,
the Yaw Damper (if installed), and will interrupt the operation of the Trim System. Release of the button
will restore power to the Trim System. However, the Autopilot will return to the HDG and ATT mode and
will require re-engagement in order to resume automatic flight.
AUTOTRIM - The Century 4000 autopilot is equipped with automatic pitch trim. When the Trim Master
switch is on, Autotrim is activated by engaging the autopilot.
*The Autotrim system is fail safe in design. The integrity of the trim system is verified by the preflight test.
CENTURY OPERATING CONTROLS
6
WHEEL SWITCH CONFIGURATIONS VARY
WITH AIRCRAFT MODEL.