TM 1-1510-218-10
3B-32
1. Pitch Wheel
2. BANK LIMIT Push Button
3. SOFT RIDE Push Button
4. TURN Knob
5. YD ENGAGE Push Button
6. AP ENGAGE Push Button
7. Elevator TRIM Annunciators
Figure 3B-17. Autopilot Controller
(a) Autopilot Disengage. The autopilot is
normally disengaged by momentarily pressing the
control wheel AP DISC switch. The autopilot may,
however, be disengaged by any of the following.
1. Actuation of the control wheel AP
DISC button. Disengagement is
confirmed by five flashes of the
AP ENG annunciator.
2. Pressing the respective vertical
gyro FAST ERECT button.
3. Actuation of respective compass
INCREASE / DECREASE switch.
4. Selection of go-around mode.
Disengagement is confirmed by
the AP ENG annunciator flashing
five times and illumination of the
GA and YD ENG annunciators.
5. Pulling the autopilot AP POWER
circuit breaker.
6. Pressing
the
autopilot
AP
ENGAGE push button.
7. When transferring between pilot
and copilot flight directors.
8. Actuation
of
either
pilot’s
or
copilot’s
electric
elevator
trim
switches while pressing only one
switch or pressing pairs of switch
elements.
Any of the following malfunctions 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.
Disengaging under any of the previous four
conditions will illuminate the AP DISC annunciator and
the flashing MASTER WARNING light. Pressing the
control wheel AP DISC switch will extinguish the AP
DISC annunciator.
(7) Elevator
TRIM
Annunciators.
The
elevator trim annunciator indicates UP or DN when a
sustained signal is being applied to the elevator servo.
The annunciator should not be illuminated when
engaging the autopilot.
h. Touch Control Steering (TCS). The TCS
push button, located on the control wheel, allows the
pilot to manually change aircraft attitude, altitude,
vertical speed and/or airspeed without disengaging the
autopilot. After completing the manual maneuver, the
TCS push button is released, and the autopilot will
