RAZAIR
‐
A1
‐
METRO
‐
III
‐
AFM
‐
001
2
‐
25
Fig.
108
Altitude
Selector
1.
ARM
switch.
Activates
the
Altitude
Hold
when
the
Autopilot
is
engaged.
Also
activates
the
ALERT
display
2.
Selected
Altitude
Display
(feet)
3.
Outer
knob
:
increments/
decrements
the
selected
altitude
in
thousands
of
feet.
4.
Inner
knob:
increments/
decrements
the
selected
altitude
in
hundreds
of
feet.
5.
ALERT
display:
Indicates
when
the
aircraft
is
within
one
thousand
feet
of
the
select
altitude.
6.
ARM
display:
Indicates
that
the
ALERT
and
Altitude
hold
are
engaged.
To
select
the
desired
altitude,
click
on
the
outer
and
inner
knobs
until
the
wanted
altitude
is
displayed.
To
activate
the
altitude
hold,
click
on
the
ARM
button.
The
ARM
warning
display
will
turn
on
indicating
the
system
is
enabled.
The
ALERT
display
will
turn
on
when
the
difference
between
aircraft
current
altitude
and
the
selected
altitude
is
less
than
one
thousand
feet.
HEADING
HOLD
The
autopilot
heading
is
controlled
by
the
HDG
knob
in
the
EHSI
Control
Panel.
To
activate
the
Heading
Hold
you
can
either
use
the
Keyboard
Command
(Default
is
Ctrl+H)
or
the
provided
2D
panel.
The
EHSI
Selected
Heading
Cue
will
rotate
until
it
reaches
the
desired
heading.
NOTE
Sometimes
it
is
necessary
to
cycle
the
ARM
switch
before
the
altitude
hold
is
engaged.