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GIV AIRPLANE FLIGHT MANUAL
SECTION 3
ABNORMAL
PROCEDURES
FAA APPROVED 3A-19
31 May 2000
AMBER CAUTION MESSAGES
CAS INDICATION CAUSE CORRECTIVE ACTION
TRIM LIMIT Autopilot elevator trim has
reached electric trim limits.
Cycle Pitch Trim switch to
DISENGAGE position and manually
trim, as required.
TRU FAIL Transformer rectifier has no
output.
Check that L or R MAIN AC bus is
powered. Check that the MAIN DC Bus
EPMP TRU/EXT Switch Light is
illuminated. If not, TRU/EXT Switch -
PUSH. Check both TRU circuit breakers
on Power Distribution Box. If still no
power, reduce load to below 250 Amps
and return Main DC Bus Switch to Auto.
TRU HOT Transformer rectifier
temperature. above 374°F
(190°C).
Reduce load on TRU. If warning
continues after two (2) minutes, select
other available DC power source(s) and
pull TRU (R AC) circuit breaker.
GULFSTREAM AEROSPACE
GIV AIRPLANE FLIGHT MANUAL
SECTION 3
ABNORMAL
PROCEDURES
3A-20 FAA APPROVED
31 May 2000
AMBER CAUTION MESSAGES
CAS INDICATION CAUSE CORRECTIVE ACTION
UNDER FLOOR O’HEAT Bleed air leak detected
under cabin floor.
If Wing Anti-Ice is on, select left wing
OFF. Wait 2 minutes. If message
persists, select right wing OFF. If
message persists, depart icing conditions.
Verify Isolation Valve closed. Select left
bleed OFF. If message persists, select
left bleed ON and right bleed OFF. If
message persists, check floor board
physically for temperature. If cool, no
action. If hot, descend to 15,000 ft or
below and select left bleed OFF and
RAM Air ON.
UTILITY HYD OFF Utility hydraulic pump has
been selected off.
Turn utility hydraulic pump to ON/ARM
if desired.
GULFSTREAM AEROSPACE
GIV AIRPLANE FLIGHT MANUAL
SECTION 3
ABNORMAL
PROCEDURES
FAA APPROVED 3A-21
31 May 2000
AMBER CAUTION MESSAGES
CAS INDICATION CAUSE CORRECTIVE ACTION
L-R WING HOT Wing anti-icing exhaust
duct temperature above
180°F (82°C).
1. Turn applicable wing anti-icing
switch to OFF. Wait two (2) minutes.
2. If message remains ON, assure
isolation valve is closed, then select
applicable side Bleed Air Switch to OFF.
3. If message remains ON, indication is
false and flight may be continued with
normal use of wing anti-icing. Reselect
applicable side Bleed Air Switch ON.
4. If message goes out in Step 2, leave
applicable Bleed Air Switch OFF, select
applicable ECS pack OFF, and re-check
isolation valve closed. Descend to
41,000 ft. Monitor cabin altitude;
descend as required.
5. Monitor wings for icing. Depart icing
conditions as soon as possible.
L-R WING TEMP LOW Wing Anti-icing exhaust
duct temperature below
100°F (38°C). Will not
illuminate for two (2)
minutes after switch ON
(time delay).
Increase thrust if flight conditions
permit. If message does not go out,
monitor wings for icing and depart icing
conditions as soon as possible.
YAW DAMPER OFF Yaw Damper switch OFF
or Yaw Damper failure.
Check Yaw Damper switch ON (light
out). If switch on, check STAB AUG
circuit breakers. Observe Yaw Damper
inop speed, See Section 1,
LIMITATIONS.
GULFSTREAM AEROSPACE
GIV AIRPLANE FLIGHT MANUAL
SECTION 3
ABNORMAL
PROCEDURES
3A-22 FAA APPROVED
31 May 2000
THIS PAGE INTENTIONALLY LEFT BLANK
GULFSTREAM AEROSPACE
GIV AIRPLANE FLIGHT MANUAL
SECTION 3
ABNORMAL
PROCEDURES
FAA APPROVED 3B-1
31 May 2000
BLUE ADVISORY MESSAGES
CAS INDICATION CAUSE CORRECTIVE ACTION
AC EXT POWER
DC EXT POWER
External power is
connected to airplane.
Remove external power before taxiing.
AP CTLR SW STUCK Autopilot Guidance Panel
switch stuck in, preventing
other selections.
Try to pry stuck switch loose.
AP ENGAGE INHIBIT An attempt is made to
engage autopilot under any
of following conditions:
Autopilot disconnect button
active
GA switch active
Airplane on GND and
airspeed less than 50 KCAS
Stick shaker is active
TCS switch active
Trim up/down switch active
Correct inhibiting situation and attempt
reengagement.
GULFSTREAM AEROSPACE
GIV AIRPLANE FLIGHT MANUAL
SECTION 3
ABNORMAL
PROCEDURES
3B-2 FAA APPROVED
31 May 2000
BLUE ADVISORY MESSAGES
CAS INDICATION CAUSE CORRECTIVE ACTION
APU ALT OFF APU alternator is operating
　
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