BendixKing KAP 140 - Manual (Page 91)

KCS 55A Compass System
116 KAP 140 AUTOPILOT SYSTEM
Rev. 3
Nov/05
Compass Warning Flag - A red flag
labeled “HDG” becomes visible in
the upper right quadrant of the dis-
play whenever the electrical power is
inadequate or the directional gyro is
not up to speed. Compass failures
can occur which will not be annunci-
ated by the “HDG” flag. Therefore,
periodic comparison with the
standby compass is advised.
NAV Warning Flag - A red flag
labeled “NAV” becomes visible in the
upper left quadrant of the display
whenever a usable signal is not
being received.
Slaving Meter ( KA 51B)
This meter indicates any differ-
ence between the displayed heading
and the magnetic heading. Right or
up deflection indicates a clockwise
error of the compass card. Left or
down deflection indicates a counter-
clockwise error of the compass card.
Whenever the aircraft is in a turn and
the card rotates, it is normal for this
meter to show a full deflection to one
side or another.
NOTE: During level flight it is normal
for the meter needle to continuously
move from side to side and to be
fully deflected during a turn. If the
needle stays fully deflected, left or
right, during level flight, the free gyro
mode can be used to center it, as
follows:
Slave and Free Gyro Switch - When
the switch is in the AUTO position,
the system is in the slaved gyro
mode. When the switch is in the
MAN position, the system is in the
free gyro mode.
Clockwise Adjustment - When the
system is in the free gyro mode,
holding the manual heading switch
to the CW position will rotate the
compass card to the right to elimi-
nate left compass card error.
Counterclockwise Adjustment -
When the system is in the free gyro
mode, holding the manual heading
switch to the CCW position will
rotate the compass card to the left to
eliminate right compass card error.
The KA 51B Slaving Control
and Compensator Unit is a small
slaving accessory which can be
used in installations where panel
space is limited. The KA 51B can be
mounted either vertically or horizon-
tally.
MAN
CW
AUTO
CCW
- +
KA 51B Slaving Meter