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fluid temperature above
220° F (104° C).
If Flight Hydraulic System is hot
and Utility Hydraulic System is
required, UTILITY PUMP switch
must be selected to ON.
If Utility Hydraulic System is not
required, select UTILITY PUMP
OFF/ARM switch to OFF.
FLIGHT REC FAIL Flight Data Recorder
has failed. It is normal
for this message to be
displayed until an
engine is started and 10
psi oil pressure is
obtained.
(1) Check CBs. Pull and reset
as necessary:
• FDR/FDAU: Copilot’s Aft
Panel, C-7
• FDR CONT #1: Copilot’s
Aft Panel, C-8
• FDR CONT #2: Copilot’s
Aft Panel, C-9
(2) On Right Hand Radio Rack
System Test/Monitor Panel,
verify FDR MAINT GND
OVRD switch is selected to
AUTO.
(3) Check for the following
annunciations and report
for maintenance action as
noted:
• DFDR FAULT and/or
FDAU FAULT indicators
illuminated on Flight
Data Acquisition Unit
• DFDR and/or FDAU
indicators illuminated on
Flight Data Entry Panel
FUEL INT TANK OPEN Fuel intertank valve is
open.
Select INTER TANK switch to
CLOSED.
FUEL XFLOW OPEN Fuel crossflow valve is
open.
Select X FLOW switch to
CLOSED.
FWC 1-2 FAIL Indicated FWC has
failed.
Select opposite FWC.
FWD EXT SW PNL
OPN
Forward external switch
panel door is open.
Close door.
OPERATING MANUAL
04-04-00 MESSAGES AND ANNUNCIATIONS PROCEDURES
Page 6
May 30/02
Revision 7
CAS Message: Possible Cause(s): Corrective Action:
FWD LAV SVC DR
OPN
Forward lavatory
service door is open.
Close door.
GND SPOILER UNARM Ground spoiler system
is not armed.
Check GND SPLR OFF/
ARMED switch; cycle to
ARMED.
GPWS FAIL Ground Proximity
Warning System
(GPWS) has failed.
(1) Check GPWS circuit
breakers:
• EGPWS AC: CP, D-10
• EGPWS DC: CP, E-10
(2) Verify at least one (1) radio
altimeter is available.
IRS 1-2 FAIL Indicated IRS has
failed.
Verify failure on Mode Select
Unit (MSU) and, if being used,
select another sensor.
IRS 1-2 HI LAT ALN IRS is in alignment
status and senses a
latitude above 70°.
Use IRS position with caution,
as accuracy may be degraded.
IRS should be left in ALIGN
mode for 15 minutes prior to
selecting NAV mode.
IRS MISCOMPARE FGC has detected an
unflagged
miscomparison fault
between IRS 1 and 2.
If the IRS MONITOR FAIL
advisory message is not
displayed on CAS, the FGC will
automatically vote either IRS 1
or IRS 2, and the autopilot and
yaw damper will remain
engaged.
If the IRS MONITOR FAIL
message is displayed on CAS,
the autopilot and yaw damper
will automatically disconnect.
Re-engagement is possible only
after the miscomparison
condition is corrected.
IRS MONITOR FAIL FGC has detected
failure of comparison
monitor located in
AHRS/IRS 3.
For monitor test to pass, AHRS/
IRS 3 must be in NAV mode
when yaw damper is engaged.
If message is displayed and an
unflagged IRS miscomparison
occurs, the autopilot and yaw
damper will automatically
disconnect.
To eliminate the message,
switch from current FGC to
opposite FGC and back, e.g.,
FGC 1 to FGC 2 to FGC 1.
IRS 1-2 NAV READY Indicated IRS has
completed alignment
but MSU panel selector
is still in ALN.
Select NAV on MSU panel
selector.
IRS 1-2 ON DC Airplane’s AC power
source to indicated IRS
has failed.
Check appropriate airplane AC
power supply. IRS will continue
to operate normally.
ISOLATION VLV OPEN ISOLATION valve is
open.
Select ISOLATION valve to
CLOSED.
OPERATING MANUAL
MESSAGES AND ANNUNCIATIONS PROCEDURES 04-04-00
Page 7
May 30/02
Revision 7
CAS Message: Possible Cause(s): Corrective Action:
MAINT SWITCH ON A Maintenance Test
(MAINT TEST) switch is
ON.
Locate MAINT TEST switch and
select to OFF:
• Left Hand Radio Rack System
Test/Monitor Panel
• Right Hand Radio Rack
System Test/Monitor Panel
• Copilot’s Aft CB Panel
(Airplanes With ASC 221
Incorporated)
NAV MISCOMP L-R
SEL
FGC has sensed
difference in navigation
receiver information and
has selected a single
receiver as NAV source.
NOTE
Message is active only
　
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