1
BACK COURSE (BC) Mode
\PPA
CPLO
tr
t
Whenever a LOC or ILS frequency is
selected, the
BC
mode
may
be
activated by
depressing the
BC
button on the Mode
Con-
troller, after selecting APPR. When
in
BC
mode
and Localizer capture occurs, the
system
will
turn and track outbound on the
front course or inbound on the back course.
“BC”
is lighted on the Annunciator Panel.
Operation on
BC
is identical to front
course operation, except that automatic
Glideslope capture is “locked
out”
by the
switching circuitry. Localizer deviation
on
PNI
will
have the proper sensing
if
the front in-
I
1
bound Localizer course
was
set
on
the PNI.
GO-AROUND Mode
The Go-Around mode is primarily de-
signed to assist the pilot in establishing the
proper pitch attitude under missed-approach
conditions. The Go-Around switch is located
on the throttle lever for pilot convenience
when applying climb-out power.
Depression of the GoAround switch dur-
ing an approach cancels the existing Night
Director
modes
and engages the &-Around
(G4)
“Je while also disengaging the
Autopilot,
if
it is engaged*. A wings-level and
pitch-up command is displayed
by
the FCI and
“GA”
is liihted on the Annunciator Panel. The
magnitude of the pitch-up command
is
set
to
match Flight Manual criteria for each aircraft
model.
Go-Around may be cancelled by use of
Vertical Trim, Altitude Hold mode, Control
Wheel Steering
mode
or by turning off the
Flight Director.
‘Some airplanes are certified with the
Autopilot remaining engaged when GA
is
selected.
OPTIONAL ALTITUDE SELECT
(ALT ARM) Mode
This mode allows the pilot
to
select an
altitude and, upon approaching that selected
altitude, obtain an automatic visual pitch com-
mand on the FCI to capture and hold the pre-
selected altitude. To operate in this mode the
pilot must:
1.
Set
the desired altitudewinf; the “selected
altitude” window of the
KAS
297
Altitude
Selector.
2.
Establish a climb or descent as appro-
oriate.
3.
Depress the ARM button on the Altitude
Selector. This may be done at any time dur-
ing the climb
or
descent before the selected
altitude has been attained. “ARM” will light
on the Altitude Selector.
4.
The Altitude “ALERT“ annunciator in the
KAS
297
will illuminate
1,OOO
ft.
prior to
reaching selected altitude and will cancel
at
300
ft.
prior. An aural tone will sound
upon reaching altitude.
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