__________________________________________________________________
Cirrus Perspective™ Line Maintenance Manual
Page 7-7
190-00920-00
Rev.
E
7.1.3
GDU
Testing
If
the
display
is
removed
or
replaced,
the
following
checks
are
recommended.
Start
PFD
and
MFD
in
normal
mode.
Press
the
ENT
key
to
acknowledge
the
agreement
on
the
MFD.
Allow
the
displays
to
initialize
for
approximately
one
minute.
The
GRS
77
and
GDC
74A
require
longer
initialization
periods
than
do
the
other
LRUs.
During
startup,
this
causes
the
attitude,
airspeed,
and
altitude
fields
to
be
invalid
during
the
first
~40
‐
60
seconds
of
PFD
power
‐
up.
Check
the
PFD
and
MFD
displays
for
the
following:
1.
Check
in
the
top
corners
of
the
PFD
and
MFD
to
see
that
all
COM/NAV
display
fields
are
valid.
2.
Check
to
see
that
altitude,
airspeed,
vertical
speed
and
OAT
fields
are
valid
on
the
PFD.
3.
Check
to
see
that
attitude
and
heading
are
valid
(unless
an
AHRS
calibration
is
required).
4.
Check
to
see
that
the
engine
instrument
fields
are
valid
on
the
MFD.
5.
Push
the
red
display
reversion
button
on
the
instrument
panel.
Make
sure
both
displays
enter
reversionary
mode
(both
should
have
valid
altitude,
airspeed,
vertical
speed,
and
engine
instruments).
6.
De
‐
activate
reversionary
mode
by
pushing
the
red
reversion
button.
NOTE
Make
sure
the
Jeppesen
aviation
database
is
present
and
that
optional
equipment
and
features
such
as
SVT,
Jeppesen
ChartView,
and
TAWS
are
operational.
Summary of Contents for Cirrus Perspective SR20
Page 2: ......