Textron Cessna 172R - Page 333

3.
If
User
Heading
is
selected,
the
flashing
cursor
will
highlight
the
Heading
field.
Turn the
small
right
knob
to
the desired
heading.
4.
Press
ENT
when
finished.
WAAS
LP
Approach
Type
Added
-The
WAAS
LP
Approach
type
and
annunciation
description
has been
added.
LP
approach
capability
is
available
for
units with
SW
Version
3.30,
or
later.
Annunciation
Description
LP LP
indicates Localizer
Performance
with
no
vertical
guidance.
Flying
the
LP
Approach
An
LP
approach
is
flown
the
same as an
LPV
approach,
except
that
verti¬
cal
guidance
is
not
provided.
Angular scaling
is
similar
to
a
localizer
approach.
Most
LP
approaches
have
step
down
altitudes
associated
with
them.
1.
Within
30
nautical miles
of
the
destination,
the
500W-series
unit
switches
from
en
route
mode
to
terminal mode and the
CDI
scale
transitions
from
2.0
to
1.0
nautical
miles,
full
scale
deflection.
2.
As
you
approach
the
IAF,
a
turn
direction
message
appears
on
the
bot¬
tom
of
the
screen.
3.
As
the distance
(DIST)
to
the
IAF
approaches
zero,
the
message
is
replaced
by
a
time
to
turn
advisory
that
counts
down
1
0
seconds
prior
to
the
turn.
4.
As
you
approach
the
FAF,
the
500W-series
unit
will
begin
to
automati¬
cally
rescale
in
an
angular
fashion.
This
will
allow the
LP
approach
to
be
flown
in
the
same
fashion
as
a
standard
localizer
approach.
At
2.0
nautical miles
from
the
FAF,
CDI
scaling
is
tightened
from
up
to
either
2°
or
0.3
nautical
miles,
full
scale
deflection,
whichever
is
smaller.
5.
Sixty
seconds
prior
to
reaching
the
FAF,
the
500W-series
unit
will
check
the
required
Horizontal Alarm
Limit
(HAL)
to
ensure
the
GPS
position
integrity
is
within
limits
to
complete
the
LP
non-precision
approach.
In
the
event
the
HAL
limits
are
exceeded,
the
approach
will
be
down¬
graded,
when
available,
indicated
by
"LNAV"
on
the
moving
map,
otherwise the
approach
will
be
aborted.
A
message
will
note
that the
approach
is
downgraded
and
the
NAV
indicator
will
be
flagged.
You
may
continue
the
approach
using
LNAV
non-precision
minimums
if
there
are
LNAV
minimums
for
this
approach.
In
the
rare
event
the
GPS
2
All manuals and user guides at all-guides.com