Moves around vertical speed scale to indicate vertical
Indicator. Indicates selected vertical speed.
Annunciator. Indicates units of pressure measurement
for altimeter setting in HG or MB.
(n) Altimeter Setting Display. Displays
altimeter setting in millibars or inches of mercury.
Annunciator. The altimeter invalid annunciator
illuminates ALT or FAIL to ndicate invalid altimeter
e. Autopilot Servo Actuators (KSA 470). To
manipulate trim surfaces, as well as elevator, aileron,
and rudder controls, the autopilot employs servo
actuators installed in the aircraft's fuselage. Each
servo assembly includes a drive motor, clutch
mechanism, and mounting bracket.
f. Autopilot Controller (KMC 440). The
autopilot controller provides selection of autopilot, yaw
damper, half bank, and soft ride functions. In addition
the autopilot also includes roll, pitch, and yaw axis
annunciators that illuminate to indicate failure of
individual control axes, and roll and vertical trim
controls. To engage autopilot modes press the
corresponding control key. To disengage, press the
key a second time.
The autopilot cannot be activated if the
flight director is not operating properly.
Annunciator lamps illuminate above the selector
keys and on the EADI to indicate autopilot mode of
operation. In the event of system failure, annunciators
corresponding to the autopilot and yaw damper will
extinguishing. An alert tone will sound upon
(1) Autopilot Controller Controls, Indicators,
and Functions. Refer to Figure 3A-8.
(a) Autopilot Engage/Disengage Push-
Button Selector Switch. Pressing the autopilot
placarded AP, initiates autopilot control of the pitch,
roll, and yaw axes, provided the system meets
preflight test criteria. The yaw damper and flight
automatically upon autopilot activation. In the absence
of any selected flight director modes, the autopilot will
follow basic roll and pitch attitude hold commands
synchronized to the aircraft attitude current upon
activation. Pressing the autopilot key a second time
cancels its operation. The flight director and yaw
damper will remain engaged until they are canceled
Illumination of the autopilot annunciator, placarded AP,
indicates that the aut opilot is engaged.
Illumination of the half bank mode annunciator,
placarded HB, indicates that the half bank mode has
been selected and is engaged.
Selector Switch. Pressing the half bank mode push-
button selector switch, placarded HALF BANK,
reduces the autopilot maximum roll attitude command
to one half the normal limit. Roll commands of lesser
magnitude are not affected. HALF BANK may be
engaged in conjunction with any flight director tracking
mode with the exception of approach. HALF BANK
may be employed at the same time as approach arm,
but will cancel automatically upon initiation of the
approach capture sequence.
(e) Autopilot Left/Right System Transfer
Indicator. The autopilot left/right system transfer
indicator consists of a left and right illuminated arrow.
The indicator, located above the autopilot transfer (AP
XFER) switch, illuminates to show which side is
controlling the aircraft.
(f) Autopilot Left/Right System Transfer
Push-Button Selector Switch. Pressing the autopilot
placarded AP XFER, changes which EFIS system (left
or right) controls the aircraft.
(g) Roll/Roll Rate Command Control
Knob. The roll/roll rate command control knob,
placarded L and R, is a rotary, return-to-center control
knob. Turning the knob modifies the flight director's
reference attitude during operations in roll attitude
hold. Turning the knob in either direction cancels any
selected flight director horizontal mode and engages
roll attitude hold. Operating the roll attitude control
does not affect arm operations in nav or approach
modes, nor does it affect flight director vertical modes,
with the exception of glideslope, which it cancels along