Control Features
Mode Select Pushbuttons
16.
HDG (heading select)
-
Alter-
nately engages and disengages head-
ing select mode.
17.
NAV (capture and track selected
navigation sensor)
-
Alternately en-
gages and disengages the navigation
mode.
18.
APR (capture and track selected
navigation sensor with approach ac-
curacy)
-
Alternately engages and
disengages the approach mode.
19.
FD (flight director)
-
Engages
Flight Director in pitch attitude hold
and wings level mode. Pressing FD
when flight director is engaged will
disengage all flight director modes
if
autopilot is not engaged.
20.
MACH (hold current MACH refer-
ence airspeed)
-
Alternately en-
gages and disengages MACH hold
mode.
21.
VNAV (fly selected vertical track
angle)
-
Alternately engages and
disengages VNAV mode.
22.
ALT (hold current reference alti-
tude)
-
Alternately engages and dis-
engages altitude hold mode.
23.
ALT SEL (automatic capture of
selected altitude) -Alternately en-
gages and disengages altitude arm
mode.
24.
CLIMB
(
climb at specified profile)
-
Alternately engages and disen-
gages climb mode.
25.
DESC (descend at specified ver-
tical speed) -Alternately engages
and disengages descent mode.
26.
IAS (hold current reference air-
speed)
-
Alternately engages and
disengages airspeed hold mode.
27.
VS (hold current or selected verti-
cal speed) -Alternately engages
and disengages vertical speed mode.
1’
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