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Page 2-4
Cirrus Perspective™ Line Maintenance Manual
Rev. E
190-00920-00
The
GIA
63W
communicates
directly
with
the
displays
through
an
HSDB
Ethernet
connection.
Software
and
configuration
settings
are
sent
from
the
displays
through
the
GIA
63W
to
other
LRUs
in
the
system.
2.5
GDC
74A
AIR
DATA
COMPUTER
Figure
2
‐
5.
GDC
74A
Air
Data
Computer
The
GDC
74A
provides
pressure
altitude,
airspeed,
vertical
speed,
and
OAT
information
to
the
system
using
data
received
from
the
pitot/static
system
and
the
OAT
probe.
The
GDC
74A
communicates
with
the
GIA
63Ws,
GDU
1240As
and
GRS
77s
using
an
ARINC
429
digital
interface.
2.6
GEA
71
ENGINE/AIRFRAME
UNIT
Figure
2
‐
6.
GEA
71
Engine/Airframe
Unit
The
unit
is
a
microprocessor
based
input/output
system
used
to
monitor
sensor
inputs
and
drive
annunciator
outputs
for
aircraft
airframes
and
engine
systems.
Sensors
include
engine
temperature
and
pressure
and
fuel
measurement
and
pressure.
The
GEA
communicates
directly
with
both
GIA
63Ws
using
RS
‐
485
digital
interface.
Software
and
configuration
settings
for
operation
are
received
through
RS
‐
232
digital
interface
with
the
GIA.
Summary of Contents for Cirrus Perspective SR20
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