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PWR OFF, then ON. If unable to reset,
place switch to OFF position.
AHRS COOL FAIL AHRS cooling fan has
failed.
Illuminates when AHRS or IRS 3 is first
turned on (five seconds) and AHRS/IRS
is in self-test. If message illuminates at
other times, Shutdown AHRS/IRS 3.
L-R ALT BRG FAIL Alternator main bearing has
failed and is operating on
auxiliary bearing.
Operation on auxiliary bearing can
continue for fifteen (15) hours at full
load or fifty (50) hours at no load. Light
will remain illuminated. Time of
occurrence should be recorded.
L-R ALT FUEL FAIL Alternate boost pump has
failed.
See Section 3 for procedure.
L-R ALT HOT Alternator temperature is
above 250°F (121°C)
Turn OFF Electric Master LEFT or
RIGHT PWR. Check EVM.
GULFSTREAM AEROSPACE
GIV AIRPLANE FLIGHT MANUAL
SECTION 3
ABNORMAL
PROCEDURES
3A-2 FAA APPROVED
31 May 2000
AMBER CAUTION MESSAGES
CAS INDICATION CAUSE CORRECTIVE ACTION
ALT MODE OFF
(deleted by ASC 415 for
SPZ 8000/8400 airplanes
and SN 1390 and sub)
Autopilot Pitch wheel has
been moved while in
altitude hold mode or
altitude preselect has been
reset while in ASEL CAP
mode. Message will time
out in five (5) seconds.
Check altitude modes and commands.
ANTI-SKID FAIL
(BRAKE-BY-WIRE)
Normal anti-skid control
circuit or other failure:
system has switched to
open loop pulsed anti-skid
control. Power switch
selected OFF.
Check Anti-Skid ON/OFF switch to be
ON. If ON, see Section 3 for procedure.
ANTI-SKID FAIL
(HMAB)
Miscompare in 28VDC
power supplies or in
nutcracker switches.
Anti-Skid Switch OFF or
system circuit problems.
Auxiliary system fails to
energize or pressure fails to
rise within three (3) seconds
after brake pedals are
depressed.
See Section 3 for procedure.
GULFSTREAM AEROSPACE
GIV AIRPLANE FLIGHT MANUAL
SECTION 3
ABNORMAL
PROCEDURES
FAA APPROVED 3A-3
31 May 2000
AMBER CAUTION MESSAGES
CAS INDICATION CAUSE CORRECTIVE ACTION
AOA HEAT 1-2 FAIL Angle-of-Attack probe
heater failed.
Check circuit breaker. If normal, avoid
icing conditions if possible. If flight in
icing conditions unavoidable, pull
appropriate Stall Warn Computer circuit
breaker and monitor other system. Full
stall barrier protection is provided by the
operative system.
AP OFF Autopilot disconnected by
other than normal means.
Press Autopilot Disconnect button to
clear message, or reengage autopilot.
AP TRIM FAIL Autotrim function of
AFGCS has failed.
Check Pitch Trim switch engaged (light
out). If out, grasp yoke securely (expect
out of trim condition), disconnect
autopilot, retrim, attempt to determine
problem.
APU ALT BRG FAIL Alternator main bearing has
failed and the alternator is
operating on auxiliary
bearing.
Operation on auxiliary bearing can
continue for fifteen (15) hours at full
load or fifty (50) hours at no load. Light
will remain illuminated. The time of
occurrence should be recorded.
GULFSTREAM AEROSPACE
GIV AIRPLANE FLIGHT MANUAL
SECTION 3
ABNORMAL
PROCEDURES
3A-4 FAA APPROVED
31 May 2001
AMBER CAUTION MESSAGES
CAS INDICATION CAUSE CORRECTIVE ACTION
APU ALT HOT APU alternator temperature.
above 300°F (149°C)
Shut off APU alternator with Electric
Master AUX PWR Switch.
APU LOAD
(SPZ 8400 equipped)
APU Electrical Load for
operation above 30,000 ft.
not in limits.
Adjust electrical load up or down as
necessary.
APU MASTER WARN APU master switch is on
but APU is not running.
Turn master switch off or start APU.
AUX AC POWER FAIL Power output from APU
ALT has failed or dropped
off line.
Turn AUX PWR Switch OFF, then ON.
If condition remains same, turn AUX
PWR Switch OFF.
AUXILIARY HYD HOT Auxiliary hyd pump case
temperature above 300°F
(149°C).
Turn off auxiliary hydraulic pump, if
practicable.
BAGGAGE DOOR Baggage door is open or
unlocked.
Close and lock Baggage Door as
required.
BATT 1-2 CHGR FAIL Battery or Battery Charger
has failed or the input
power circuit breaker is
open.
Check the circuit breaker: If open, close
the circuit breaker. If light remains on,
deactivate the battery charger by pulling
CB. Light will remain ON. Refer to
Battery or Battery Charger Failure,
　
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