____________________________________________________________________
Cirrus Perspective™ Line Maintenance Manual
Page 5-5
190-00920-00
Rev.
E
System
Annunciation
Troubleshooting
(continued)
Annunciation
Associated
LRU
Solution
ATTITUDE
FAIL
GRS
77
#1
or
Optional
#2
•
Make
sure
a
cell
phone
or
a
device
using
cell
phone
technology
is
not
turned
on
(even
in
a
monitoring
state)
in
the
cabin.
•
Check
PFD
Alert
Window
for
PFD,
MFD
or
GRS
configuration,
software
or
failed
data
path
error
messages.
Correct
any
errors
before
proceeding.
•
For
an
attitude
failure
while
parked,
check
the
following:
−
Is
aircraft
stationary
if
GPS
is
not
available?
Aircraft
movement
(rocking
the
wings
or
moving
the
tail)
may
cause
the
attitude
and
heading
to
fail
if
it
believes
the
aircraft
is
in
motion
without
GPS
input.
−
Check
to
see
if
the
GPS
has
acquired
at
least
four
satellites,
has
a
3D
navigation
solution,
and
a
DOP
of
less
than
5.0.
•
Check
for
metal
objects
(tool
boxes,
power
carts,
nearby
large
steel
structures,
etc.)
around
the
aircraft
that
could
be
interfering
with
the
magnetometer.
•
Cycle
GRS
77
power
to
restart
initialization.
•
Check
the
GRS
77
connecter
for
security
and
that
proper
wire
harness
strain
relief
is
provided.
•
Check
to
see
if
the
GRS
77
is
fastened
down
tightly
in
its
mounting
rack
and
that
the
mounting
rack
is
not
loose
(CAUTION
‐
do
not
loosen
the
mounting
rack
hardware
to
the
airframe
shelf
or
the
aircraft
will
need
to
be
re
‐
leveled
and
the
PITCH/ROLL
OFFSET
procedure
performed).
•
Perform
an
Engine
Run
‐
Up
Test
to
check
if
engine
vibration
is
causing
the
GRS
77
to
go
offline.
•
Replace
the
GRS
77.
•
If
problem
persists,
replace
the
GRS
77
configuration
module.
•
Contact
Garmin
Aviation
Product
Support
if
condition
continues
after
replacing
the
GRS
77
and/or
config
module.
Summary of Contents for Cirrus Perspective SR20
Page 2: ......
