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FWC 1-2 FAIL Fault warning computer has
failed.
Select other FWC.
FWD EXT SW PNL OPN Forward external switch
panel door is OPEN.
CLOSE door.
FWD LAV SVC DR OPN Forward lavatory service
door is OPEN.
CLOSE door.
GND SPOILER UNARM Gnd. spoilers not armed. Check switch; cycle to ARMED.
GPWS FAIL Ground Proximity Warning
System (GPWS) has failed.
1. Check CBs:
- 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 MSU panel 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, accuracy
may be degraded. IRS's should be left
in ALIGN mode for 15 minutes prior to
selecting NAV mode.
GULFSTREAM AEROSPACE
GIV AIRPLANE FLIGHT MANUAL
SECTION 3
ABNORMAL
PROCEDURES
FAA APPROVED 3B-11
30 May 2002
BLUE ADVISORY MESSAGES
CAS INDICATION CAUSE CORRECTIVE ACTION
IRS MISCOMPARE FGC has detected an
unflagged miscompare fault
between IRS 1/2.
If there is no "IRS monitor fail" message
FGC will automatically vote either IRS 1
or IRS 2 and AP/YD will remain
engaged. If there is "IRS monitor fail"
message present, the AP/YD will
automatically disconnect.
Reengagement is possible only after
miscompare condition is corrected.
IRS MONITOR FAIL FGC has detected failure of
comparison monitor located
in AHRS/IRS 3.
AHRS/IRS 3 must be in NAV mode
when YD is engaged for monitor test to
pass. If message is present and
unflagged IRS miscompare occurs,
AP/YD will 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 "ALIGN".
Select "NAV" on MSU panel selector.
IRS 1-2 ON DC Airplane AC power supply
has failed.
Check appropriate airplane AC power
supply. IRS will continue to operate
normally.
ISOLATION VLV OPEN Isolation valve is open. Select isolation valve CLOSED.
GULFSTREAM AEROSPACE
GIV AIRPLANE FLIGHT MANUAL
SECTION 3
ABNORMAL
PROCEDURES
3B-12 FAA APPROVED
31 May 2000
BLUE ADVISORY MESSAGES
CAS INDICATION CAUSE CORRECTIVE ACTION
MAINT SWITCH ON Maintenance switch is on. Turn off maintenance switch located in each
avionics rack.
NAV MISCOMP L-R SEL FGC has sensed difference
in navigation receiver
information and selected a
single receiver as NAV
source.
None. Switch over is automatic.
NOTE: Message is active only in ILS dual coupled mod.
NZ 1-2 FAIL Indicated navigation
computer has failed.
Check appropriate circuit breaker. Associated
FMS CDU will be blank or display PERF
INDEX.
L-R OIL FILT BPASS Engine oil filter has
clogged.
Monitor engine oil pressure. If pressure falls
below limits, proceed with engine shutdown
procedure in Section 4.
PERF 1-2 FAIL Indicated performance
computer has failed.
Check appropriate circuit breaker. Performance
information and auto- throttle computer will not
be available.
GULFSTREAM AEROSPACE
GIV AIRPLANE FLIGHT MANUAL
SECTION 3
ABNORMAL
PROCEDURES
FAA APPROVED 3B-13
31 May 2000
BLUE ADVISORY MESSAGES
CAS INDICATION CAUSE CORRECTIVE ACTION
PROG MSG 1-2 FAIL
(SPZ 8400 equipped)
Programmable Message
Modules have failed.
Notify maintenance for corrective action.
PROG MSG 1-2
MISMATCH
(SPZ 8400 equipped)
Programmable Message
Modules do not contain
same messages.
Notify maintenance for corrective action.
RAD ALT 1-2 FAIL Radar altimeter has failed. Select opposite Radar Altimeter.
RECENTER TURN
KNOB
Turn knob is not centered.
Autopilot cannot be
engaged.
Recenter turn knob.
RUDDER LIMIT Rudder actuator torque
limiter is in operation.
None
GULFSTREAM AEROSPACE
GIV AIRPLANE FLIGHT MANUAL
SECTION 3
ABNORMAL
PROCEDURES
3B-14 FAA APPROVED
31 May 2000
BLUE ADVISORY MESSAGES
CAS INDICATION CAUSE CORRECTIVE ACTION
RUDDER STRG OFF With ASC 302A installed
“Hand Wheel Only” is
selected.
None required if this is desired mode. If
not, select “Normal” mode.
SELECT INHIBIT An attempt is made to
manually select invalid
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湾4飞机飞行手册AFM Gulfstream IV AIRPLANE FLIGHT MANUAL 1(87)
